66.16x=0.0177
    0.2x=（x-174）
    33.724ln(x) - 3.9482= 84.1
    33.724ln(x) - 3.9482= 50
    33.725ln(x) - 6.2487= 84.1
    33.725ln(x) - 6.2487= 50
    sin(x)+cos(x)=0.2
    sin(x)*cos(x)=-12/25
    （x-1.444）*300-0.2=2
    （x-1.444）*300-0.2=1
    （x-1.479）*300-0.1=1
    s＾4+24s＾3+100s＾2+40s+1389=0
    (x-1.399)*200-0.1=1
    X^2+25X-5850=0
    (x-4.812)*400-0.1=6
    x*x+6x-9
    (1-1/1-x)/x^2/x^-1
    y=cos2*sin2
    y=sin2*tan2
    y=tan3*cos2

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