There are 1 questions in this calculation: for each question, the 1 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ first\ derivative\ of\ function\ -xu{(\frac{(s(p + q + t - uy) + a(m - n - b))}{(s(2t - xu - yu) - 2ab)})}^{2} + (p - f + \frac{b(m - g)}{s})(\frac{(s(p + q + t - uy) + a(m - n - b))}{(s(2t - xu - yu) - 2ab)}) + (m - g)(\frac{1}{2} + \frac{(m - n)s}{2} - \frac{bs}{2})\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = \frac{-us^{2}p^{2}x}{(2st - usx - usy - 2ab)^{2}} - \frac{2us^{2}pqx}{(2st - usx - usy - 2ab)^{2}} - \frac{2us^{2}ptx}{(2st - usx - usy - 2ab)^{2}} + \frac{2u^{2}s^{2}pyx}{(2st - usx - usy - 2ab)^{2}} - \frac{2uspamx}{(2st - usx - usy - 2ab)^{2}} + \frac{2uspanx}{(2st - usx - usy - 2ab)^{2}} + \frac{2uspabx}{(2st - usx - usy - 2ab)^{2}} - \frac{us^{2}q^{2}x}{(2st - usx - usy - 2ab)^{2}} - \frac{2us^{2}qtx}{(2st - usx - usy - 2ab)^{2}} + \frac{2u^{2}s^{2}qyx}{(2st - usx - usy - 2ab)^{2}} - \frac{2usqamx}{(2st - usx - usy - 2ab)^{2}} + \frac{2usqanx}{(2st - usx - usy - 2ab)^{2}} + \frac{2usqabx}{(2st - usx - usy - 2ab)^{2}} - \frac{us^{2}t^{2}x}{(2st - usx - usy - 2ab)^{2}} + \frac{2u^{2}s^{2}tyx}{(2st - usx - usy - 2ab)^{2}} - \frac{2ustamx}{(2st - usx - usy - 2ab)^{2}} + \frac{2ustanx}{(2st - usx - usy - 2ab)^{2}} + \frac{2ustabx}{(2st - usx - usy - 2ab)^{2}} - \frac{u^{3}s^{2}y^{2}x}{(2st - usx - usy - 2ab)^{2}} + \frac{2u^{2}syamx}{(2st - usx - usy - 2ab)^{2}} - \frac{2u^{2}syanx}{(2st - usx - usy - 2ab)^{2}} - \frac{2u^{2}syabx}{(2st - usx - usy - 2ab)^{2}} - \frac{ua^{2}m^{2}x}{(2st - usx - usy - 2ab)^{2}} + \frac{2ua^{2}mnx}{(2st - usx - usy - 2ab)^{2}} + \frac{2ua^{2}mbx}{(2st - usx - usy - 2ab)^{2}} - \frac{ua^{2}n^{2}x}{(2st - usx - usy - 2ab)^{2}} - \frac{2ua^{2}nbx}{(2st - usx - usy - 2ab)^{2}} - \frac{ua^{2}b^{2}x}{(2st - usx - usy - 2ab)^{2}} + \frac{spq}{(2st - usx - usy - 2ab)} + \frac{spt}{(2st - usx - usy - 2ab)} - \frac{spf}{(2st - usx - usy - 2ab)} - \frac{uspy}{(2st - usx - usy - 2ab)} + \frac{pam}{(2st - usx - usy - 2ab)} - \frac{pan}{(2st - usx - usy - 2ab)} - \frac{pab}{(2st - usx - usy - 2ab)} + \frac{sp^{2}}{(2st - usx - usy - 2ab)} - \frac{sqf}{(2st - usx - usy - 2ab)} - \frac{stf}{(2st - usx - usy - 2ab)} + \frac{usyf}{(2st - usx - usy - 2ab)} - \frac{amf}{(2st - usx - usy - 2ab)} + \frac{anf}{(2st - usx - usy - 2ab)} + \frac{abf}{(2st - usx - usy - 2ab)} + \frac{pmb}{(2st - usx - usy - 2ab)} + \frac{qmb}{(2st - usx - usy - 2ab)} + \frac{tmb}{(2st - usx - usy - 2ab)} - \frac{uymb}{(2st - usx - usy - 2ab)} - \frac{ambg}{(2st - usx - usy - 2ab)s} - \frac{amnb}{(2st - usx - usy - 2ab)s} - \frac{amb^{2}}{(2st - usx - usy - 2ab)s} - \frac{pbg}{(2st - usx - usy - 2ab)} - \frac{qbg}{(2st - usx - usy - 2ab)} - \frac{tbg}{(2st - usx - usy - 2ab)} + \frac{uybg}{(2st - usx - usy - 2ab)} + \frac{am^{2}b}{(2st - usx - usy - 2ab)s} + \frac{anbg}{(2st - usx - usy - 2ab)s} + \frac{ab^{2}g}{(2st - usx - usy - 2ab)s} + \frac{1}{2}m - \frac{1}{2}smn - \frac{1}{2}smb - \frac{1}{2}smg - \frac{1}{2}g + \frac{1}{2}sm^{2} + \frac{1}{2}sng + \frac{1}{2}sbg\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( \frac{-us^{2}p^{2}x}{(2st - usx - usy - 2ab)^{2}} - \frac{2us^{2}pqx}{(2st - usx - usy - 2ab)^{2}} - \frac{2us^{2}ptx}{(2st - usx - usy - 2ab)^{2}} + \frac{2u^{2}s^{2}pyx}{(2st - usx - usy - 2ab)^{2}} - \frac{2uspamx}{(2st - usx - usy - 2ab)^{2}} + \frac{2uspanx}{(2st - usx - usy - 2ab)^{2}} + \frac{2uspabx}{(2st - usx - usy - 2ab)^{2}} - \frac{us^{2}q^{2}x}{(2st - usx - usy - 2ab)^{2}} - \frac{2us^{2}qtx}{(2st - usx - usy - 2ab)^{2}} + \frac{2u^{2}s^{2}qyx}{(2st - usx - usy - 2ab)^{2}} - \frac{2usqamx}{(2st - usx - usy - 2ab)^{2}} + \frac{2usqanx}{(2st - usx - usy - 2ab)^{2}} + \frac{2usqabx}{(2st - usx - usy - 2ab)^{2}} - \frac{us^{2}t^{2}x}{(2st - usx - usy - 2ab)^{2}} + \frac{2u^{2}s^{2}tyx}{(2st - usx - usy - 2ab)^{2}} - \frac{2ustamx}{(2st - usx - usy - 2ab)^{2}} + \frac{2ustanx}{(2st - usx - usy - 2ab)^{2}} + \frac{2ustabx}{(2st - usx - usy - 2ab)^{2}} - \frac{u^{3}s^{2}y^{2}x}{(2st - usx - usy - 2ab)^{2}} + \frac{2u^{2}syamx}{(2st - usx - usy - 2ab)^{2}} - \frac{2u^{2}syanx}{(2st - usx - usy - 2ab)^{2}} - \frac{2u^{2}syabx}{(2st - usx - usy - 2ab)^{2}} - \frac{ua^{2}m^{2}x}{(2st - usx - usy - 2ab)^{2}} + \frac{2ua^{2}mnx}{(2st - usx - usy - 2ab)^{2}} + \frac{2ua^{2}mbx}{(2st - usx - usy - 2ab)^{2}} - \frac{ua^{2}n^{2}x}{(2st - usx - usy - 2ab)^{2}} - \frac{2ua^{2}nbx}{(2st - usx - usy - 2ab)^{2}} - \frac{ua^{2}b^{2}x}{(2st - usx - usy - 2ab)^{2}} + \frac{spq}{(2st - usx - usy - 2ab)} + \frac{spt}{(2st - usx - usy - 2ab)} - \frac{spf}{(2st - usx - usy - 2ab)} - \frac{uspy}{(2st - usx - usy - 2ab)} + \frac{pam}{(2st - usx - usy - 2ab)} - \frac{pan}{(2st - usx - usy - 2ab)} - \frac{pab}{(2st - usx - usy - 2ab)} + \frac{sp^{2}}{(2st - usx - usy - 2ab)} - \frac{sqf}{(2st - usx - usy - 2ab)} - \frac{stf}{(2st - usx - usy - 2ab)} + \frac{usyf}{(2st - usx - usy - 2ab)} - \frac{amf}{(2st - usx - usy - 2ab)} + \frac{anf}{(2st - usx - usy - 2ab)} + \frac{abf}{(2st - usx - usy - 2ab)} + \frac{pmb}{(2st - usx - usy - 2ab)} + \frac{qmb}{(2st - usx - usy - 2ab)} + \frac{tmb}{(2st - usx - usy - 2ab)} - \frac{uymb}{(2st - usx - usy - 2ab)} - \frac{ambg}{(2st - usx - usy - 2ab)s} - \frac{amnb}{(2st - usx - usy - 2ab)s} - \frac{amb^{2}}{(2st - usx - usy - 2ab)s} - \frac{pbg}{(2st - usx - usy - 2ab)} - \frac{qbg}{(2st - usx - usy - 2ab)} - \frac{tbg}{(2st - usx - usy - 2ab)} + \frac{uybg}{(2st - usx - usy - 2ab)} + \frac{am^{2}b}{(2st - usx - usy - 2ab)s} + \frac{anbg}{(2st - usx - usy - 2ab)s} + \frac{ab^{2}g}{(2st - usx - usy - 2ab)s} + \frac{1}{2}m - \frac{1}{2}smn - \frac{1}{2}smb - \frac{1}{2}smg - \frac{1}{2}g + \frac{1}{2}sm^{2} + \frac{1}{2}sng + \frac{1}{2}sbg\right)}{dx}\\=&-(\frac{-2(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{3}})us^{2}p^{2}x - \frac{us^{2}p^{2}}{(2st - usx - usy - 2ab)^{2}} - 2(\frac{-2(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{3}})us^{2}pqx - \frac{2us^{2}pq}{(2st - usx - usy - 2ab)^{2}} - 2(\frac{-2(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{3}})us^{2}ptx - \frac{2us^{2}pt}{(2st - usx - usy - 2ab)^{2}} + 2(\frac{-2(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{3}})u^{2}s^{2}pyx + \frac{2u^{2}s^{2}py}{(2st - usx - usy - 2ab)^{2}} - 2(\frac{-2(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{3}})uspamx - \frac{2uspam}{(2st - usx - usy - 2ab)^{2}} + 2(\frac{-2(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{3}})uspanx + \frac{2uspan}{(2st - usx - usy - 2ab)^{2}} + 2(\frac{-2(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{3}})uspabx + \frac{2uspab}{(2st - usx - usy - 2ab)^{2}} - (\frac{-2(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{3}})us^{2}q^{2}x - \frac{us^{2}q^{2}}{(2st - usx - usy - 2ab)^{2}} - 2(\frac{-2(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{3}})us^{2}qtx - \frac{2us^{2}qt}{(2st - usx - usy - 2ab)^{2}} + 2(\frac{-2(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{3}})u^{2}s^{2}qyx + \frac{2u^{2}s^{2}qy}{(2st - usx - usy - 2ab)^{2}} - 2(\frac{-2(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{3}})usqamx - \frac{2usqam}{(2st - usx - usy - 2ab)^{2}} + 2(\frac{-2(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{3}})usqanx + \frac{2usqan}{(2st - usx - usy - 2ab)^{2}} + 2(\frac{-2(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{3}})usqabx + \frac{2usqab}{(2st - usx - usy - 2ab)^{2}} - (\frac{-2(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{3}})us^{2}t^{2}x - \frac{us^{2}t^{2}}{(2st - usx - usy - 2ab)^{2}} + 2(\frac{-2(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{3}})u^{2}s^{2}tyx + \frac{2u^{2}s^{2}ty}{(2st - usx - usy - 2ab)^{2}} - 2(\frac{-2(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{3}})ustamx - \frac{2ustam}{(2st - usx - usy - 2ab)^{2}} + 2(\frac{-2(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{3}})ustanx + \frac{2ustan}{(2st - usx - usy - 2ab)^{2}} + 2(\frac{-2(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{3}})ustabx + \frac{2ustab}{(2st - usx - usy - 2ab)^{2}} - (\frac{-2(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{3}})u^{3}s^{2}y^{2}x - \frac{u^{3}s^{2}y^{2}}{(2st - usx - usy - 2ab)^{2}} + 2(\frac{-2(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{3}})u^{2}syamx + \frac{2u^{2}syam}{(2st - usx - usy - 2ab)^{2}} - 2(\frac{-2(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{3}})u^{2}syanx - \frac{2u^{2}syan}{(2st - usx - usy - 2ab)^{2}} - 2(\frac{-2(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{3}})u^{2}syabx - \frac{2u^{2}syab}{(2st - usx - usy - 2ab)^{2}} - (\frac{-2(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{3}})ua^{2}m^{2}x - \frac{ua^{2}m^{2}}{(2st - usx - usy - 2ab)^{2}} + 2(\frac{-2(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{3}})ua^{2}mnx + \frac{2ua^{2}mn}{(2st - usx - usy - 2ab)^{2}} + 2(\frac{-2(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{3}})ua^{2}mbx + \frac{2ua^{2}mb}{(2st - usx - usy - 2ab)^{2}} - (\frac{-2(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{3}})ua^{2}n^{2}x - \frac{ua^{2}n^{2}}{(2st - usx - usy - 2ab)^{2}} - 2(\frac{-2(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{3}})ua^{2}nbx - \frac{2ua^{2}nb}{(2st - usx - usy - 2ab)^{2}} - (\frac{-2(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{3}})ua^{2}b^{2}x - \frac{ua^{2}b^{2}}{(2st - usx - usy - 2ab)^{2}} + (\frac{-(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{2}})spq + 0 + (\frac{-(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{2}})spt + 0 - (\frac{-(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{2}})spf + 0 - (\frac{-(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{2}})uspy + 0 + (\frac{-(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{2}})pam + 0 - (\frac{-(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{2}})pan + 0 - (\frac{-(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{2}})pab + 0 + (\frac{-(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{2}})sp^{2} + 0 - (\frac{-(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{2}})sqf + 0 - (\frac{-(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{2}})stf + 0 + (\frac{-(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{2}})usyf + 0 - (\frac{-(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{2}})amf + 0 + (\frac{-(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{2}})anf + 0 + (\frac{-(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{2}})abf + 0 + (\frac{-(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{2}})pmb + 0 + (\frac{-(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{2}})qmb + 0 + (\frac{-(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{2}})tmb + 0 - (\frac{-(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{2}})uymb + 0 - \frac{(\frac{-(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{2}})ambg}{s} + 0 - \frac{(\frac{-(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{2}})amnb}{s} + 0 - \frac{(\frac{-(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{2}})amb^{2}}{s} + 0 - (\frac{-(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{2}})pbg + 0 - (\frac{-(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{2}})qbg + 0 - (\frac{-(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{2}})tbg + 0 + (\frac{-(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{2}})uybg + 0 + \frac{(\frac{-(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{2}})am^{2}b}{s} + 0 + \frac{(\frac{-(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{2}})anbg}{s} + 0 + \frac{(\frac{-(0 - us + 0 + 0)}{(2st - usx - usy - 2ab)^{2}})ab^{2}g}{s} + 0 + 0 + 0 + 0 + 0 + 0 + 0 + 0 + 0\\=&\frac{-2u^{2}s^{3}p^{2}x}{(2st - usx - usy - 2ab)^{3}} - \frac{4u^{2}s^{3}pqx}{(2st - usx - usy - 2ab)^{3}} - \frac{us^{2}pq}{(2st - usx - usy - 2ab)^{2}} - \frac{4u^{2}s^{3}ptx}{(2st - usx - usy - 2ab)^{3}} - \frac{us^{2}pt}{(2st - usx - usy - 2ab)^{2}} + \frac{4u^{3}s^{3}pyx}{(2st - usx - usy - 2ab)^{3}} + \frac{u^{2}s^{2}py}{(2st - usx - usy - 2ab)^{2}} - \frac{4u^{2}s^{2}pamx}{(2st - usx - usy - 2ab)^{3}} - \frac{uspam}{(2st - usx - usy - 2ab)^{2}} + \frac{4u^{2}s^{2}panx}{(2st - usx - usy - 2ab)^{3}} + \frac{uspan}{(2st - usx - usy - 2ab)^{2}} + \frac{4u^{2}s^{2}pabx}{(2st - usx - usy - 2ab)^{3}} + \frac{uspab}{(2st - usx - usy - 2ab)^{2}} - \frac{2u^{2}s^{3}q^{2}x}{(2st - usx - usy - 2ab)^{3}} - \frac{4u^{2}s^{3}qtx}{(2st - usx - usy - 2ab)^{3}} - \frac{2us^{2}qt}{(2st - usx - usy - 2ab)^{2}} + \frac{4u^{3}s^{3}qyx}{(2st - usx - usy - 2ab)^{3}} + \frac{2u^{2}s^{2}qy}{(2st - usx - usy - 2ab)^{2}} - \frac{4u^{2}s^{2}qamx}{(2st - usx - usy - 2ab)^{3}} - \frac{2usqam}{(2st - usx - usy - 2ab)^{2}} + \frac{4u^{2}s^{2}qanx}{(2st - usx - usy - 2ab)^{3}} + \frac{2usqan}{(2st - usx - usy - 2ab)^{2}} + \frac{4u^{2}s^{2}qabx}{(2st - usx - usy - 2ab)^{3}} + \frac{2usqab}{(2st - usx - usy - 2ab)^{2}} - \frac{us^{2}qf}{(2st - usx - usy - 2ab)^{2}} - \frac{2u^{2}s^{3}t^{2}x}{(2st - usx - usy - 2ab)^{3}} + \frac{4u^{3}s^{3}tyx}{(2st - usx - usy - 2ab)^{3}} + \frac{2u^{2}s^{2}ty}{(2st - usx - usy - 2ab)^{2}} - \frac{4u^{2}s^{2}tamx}{(2st - usx - usy - 2ab)^{3}} - \frac{2ustam}{(2st - usx - usy - 2ab)^{2}} + \frac{4u^{2}s^{2}tanx}{(2st - usx - usy - 2ab)^{3}} + \frac{2ustan}{(2st - usx - usy - 2ab)^{2}} + \frac{4u^{2}s^{2}tabx}{(2st - usx - usy - 2ab)^{3}} + \frac{2ustab}{(2st - usx - usy - 2ab)^{2}} - \frac{us^{2}tf}{(2st - usx - usy - 2ab)^{2}} - \frac{2u^{4}s^{3}y^{2}x}{(2st - usx - usy - 2ab)^{3}} + \frac{4u^{3}s^{2}yamx}{(2st - usx - usy - 2ab)^{3}} + \frac{2u^{2}syam}{(2st - usx - usy - 2ab)^{2}} - \frac{4u^{3}s^{2}yanx}{(2st - usx - usy - 2ab)^{3}} - \frac{2u^{2}syan}{(2st - usx - usy - 2ab)^{2}} - \frac{4u^{3}s^{2}yabx}{(2st - usx - usy - 2ab)^{3}} - \frac{2u^{2}syab}{(2st - usx - usy - 2ab)^{2}} + \frac{u^{2}s^{2}yf}{(2st - usx - usy - 2ab)^{2}} - \frac{2u^{2}sa^{2}m^{2}x}{(2st - usx - usy - 2ab)^{3}} - \frac{uamnb}{(2st - usx - usy - 2ab)^{2}} + \frac{4u^{2}sa^{2}mnx}{(2st - usx - usy - 2ab)^{3}} - \frac{uambg}{(2st - usx - usy - 2ab)^{2}} + \frac{4u^{2}sa^{2}mbx}{(2st - usx - usy - 2ab)^{3}} + \frac{2ua^{2}mb}{(2st - usx - usy - 2ab)^{2}} - \frac{2u^{2}sa^{2}n^{2}x}{(2st - usx - usy - 2ab)^{3}} + \frac{uanbg}{(2st - usx - usy - 2ab)^{2}} - \frac{4u^{2}sa^{2}nbx}{(2st - usx - usy - 2ab)^{3}} - \frac{2ua^{2}nb}{(2st - usx - usy - 2ab)^{2}} - \frac{2u^{2}sa^{2}b^{2}x}{(2st - usx - usy - 2ab)^{3}} + \frac{uab^{2}g}{(2st - usx - usy - 2ab)^{2}} - \frac{us^{2}pf}{(2st - usx - usy - 2ab)^{2}} + \frac{usqmb}{(2st - usx - usy - 2ab)^{2}} + \frac{ustmb}{(2st - usx - usy - 2ab)^{2}} - \frac{u^{2}symb}{(2st - usx - usy - 2ab)^{2}} - \frac{usamf}{(2st - usx - usy - 2ab)^{2}} + \frac{usanf}{(2st - usx - usy - 2ab)^{2}} + \frac{usabf}{(2st - usx - usy - 2ab)^{2}} + \frac{uspmb}{(2st - usx - usy - 2ab)^{2}} - \frac{usqbg}{(2st - usx - usy - 2ab)^{2}} - \frac{ustbg}{(2st - usx - usy - 2ab)^{2}} + \frac{u^{2}sybg}{(2st - usx - usy - 2ab)^{2}} + \frac{2ua^{2}mn}{(2st - usx - usy - 2ab)^{2}} - \frac{uamb^{2}}{(2st - usx - usy - 2ab)^{2}} + \frac{uam^{2}b}{(2st - usx - usy - 2ab)^{2}} - \frac{uspbg}{(2st - usx - usy - 2ab)^{2}} - \frac{us^{2}q^{2}}{(2st - usx - usy - 2ab)^{2}} - \frac{us^{2}t^{2}}{(2st - usx - usy - 2ab)^{2}} - \frac{u^{3}s^{2}y^{2}}{(2st - usx - usy - 2ab)^{2}} - \frac{ua^{2}m^{2}}{(2st - usx - usy - 2ab)^{2}} - \frac{ua^{2}n^{2}}{(2st - usx - usy - 2ab)^{2}} - \frac{ua^{2}b^{2}}{(2st - usx - usy - 2ab)^{2}}\\ \end{split}\end{equation} \]

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