2x²+150x＝150²π½
    x^2-1.5*x+1-1.5×e^（-0.5）=0
    s^4+7s^3+42s+30=0
    50 = 0.7333x - 32.995
    y^3+3y+2=0
    x/x-32-30=2
    50 = 0.7166x - 30.997
    xex－5ex+5＝0
    x＋1÷(1-x)＋(x-1)÷x＝19÷6
    A×3700+3300×(A-1)=3500
    1250×(1-x)=1000
    4x^3-29x=24
    (138+259)/31*x+164.5/31*(x+15)+124/31(x+30)=1178
    10*(2x-20)*(x-20)=1500
    46.31*(1+x)^12=60
    46.31*(1+x)12=60
    23.25 = arcsin(x/145)
    23.25=arcsin(x/145)
    （27.134+x）×2.75＝54.269+73.203-x
    （27.134+x）×2.75＝54.269+73.703-x

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