Mathematics
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    a^(2)+3a-4=0
    4ln4-4
    5.2ln5.2-5.2
    x*(e^(56.52/x)+e^(-56.52/x))/(e^(56.52/x)+e^(-56.52/x))=112.8
    113.8^x=1.718*10^98
    5+8
    sqrt(1.6408*4/3.1415926)
    8.204/5
    sqrt(4*8.204/3.1415926)
    3.106*10^(-6)*1735*1321.307*0.2827/((1.5*10^6)^(1-0.6155))
    90*3.1415926
    90*pi
    73.883×1.5-70.113
    20%*(100*10000+900000) = A*10000-A*10000*5%-1900000
    6x+3x=600
    x^2+6x-75=0
    arctan(3.46)
    arctan(3.85)
    40000*(1+x)^-1+40000*(1+x)^-2+40000*(1+x)^-3+40000*(1+x)^-4+540000*(1+x)^-5=560000
    1.05^4

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