Mathematics
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    2+0.6*2.5
    0.00045*1.1*1.8*1197
    1990.75*(1-4*2192*2192/(15500*15500))
    1990.75*(1-(4*2192*2192)/15500*15500
    171.13+(577.02-171.13)(2*2192)/15500
    171.13+(577.02-171.13)(2*2192)/7750
    171.13+(577.02-171.13)2*2192/7750
    54000-5.7964x
    (11.5*1620*78)/415
    11.5*1620*120*(1367-120/2)
    5.62+0.4*(25.14)/1.3
    -2.41+0.4*(-16.34)/1.3
    5.62+0.7*25.14/1.3
    -2.41+0.7*(-16.34)/1.3
    1.2*5.62 + 1.4*25.14
    1.2*(-2.41)+1.4*(-16.34)
    1.3*(140*2)/(4*3.62)
    -1.3*(140*2)/(4*3.62)*(0.86-0.84/4)
     0.20+2*0.15+1.4+2*0.86 =
    (0.20+2*0.15)+2*0.86

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