e^x=sinx
    0.2+50*x*0.03=0.25+50*x*(x-0.06)
    xlnx+2.2073x=0.0173
    (x-x/1.13*0.13)/7.17=0.076
    20=（1-x^2）/（1.4×x^2）+（6/7）×㏑（1.2×x^2/（1+0.2×x^2））
    -18.34+1.498x+0.001377（x^2）=1314.49
    -18.34+1.498x+0.001377（x^2）=692.86
    -18.34+1.498x+0.001377x2=692.86
    X-（X-X/1.064*0.064）*0.2=61074.39
    1-(1+a)^-5=a*3.181
    0.1-0.1X=X
    0.25w^6+1.25w^4+w^2=255
    X-X*0.065-X*0.0003=169541.29
    sinx
    x*x*x/2*（1+x）*（1+x）
    R^2-45R+324=0
    （12500-x）/[（-89/31）x]
    0.4374497/(5.99-x)+1.037088/(2.34-x)+0.4463/(1-x)+0.0160648/(0.43-x)=0.1
    X^3-5X^2+6X-1=0
    sinπx/2

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