1.25x/(1-0.25x^2)=1
    3×s^2+8×s+13＝0
    3×s^2+8s+13＝0
    (2s＋4)s＋(s×s＋4s＋13)＝0
    （32+x）*3-（32-x）*4=10
    （11227+28×60+5000+60X）/93=X+121+28+12
    （17427+60x）/93=x+171
    x²/（100-x）(500-x)=1.43
    2/3*x*x*x
    2023(5-y)+14155=2028-y
    x/((0.05-x)*(0.25-2*x)^2)=1.1*10^7
    x/((0.05-x)*(0.25-2*x)^2)=1.6*10^7
    12138+m=-2017
    x/((0.05-x)*(0.25-2*x)^2)=0
    2.5*sqrt(5.29)/(x*sqrt(1+x^2)*sqrt(1+(0.25x)^2)) = 1
    2.5*sqrt(3.69)/(x*sqrt(1+x^2)*sqrt(1+(0.25x)^2))=1
    2.5*sqrt(2.77)/(x*sqrt(1+x^2)*sqrt(1+(0.25x)^2))=1
    4x^3-5x+2=0
    x^6+17x^4+16x^2-100=0
    1+x=6

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