7.46-（（1456/（（50*x）+（0.15*（x^2）））/19.62）
    7.46-（（1456/（（50*x）+（0.15*（x^2）））/19.62）
    7.46-（（1456/（x+（0.15*（x^2）））/19.62）
    x÷350－x÷3750＝1.705
    cosx＝x
    cosx＝x
    x*x-3*x+2=0
    ln3/9=lnx/x
    x^3-6x^2+14x-6＝0
    x3-6x2+14x-6=0
    x
    x7
    99.675*(x－554.18)^(3/2)+2.6*4.43*(x－525)^(1/2)=2050
    99.675*(560－x)^(3/2)+2.6*(2*9.81*3)^(1/2)=1420
    x-（x×13%）=9090
    99.675*(x－560)^(3/2)+2.6*4.43*(x－525)^(1/2)=2050
    8.65*(x－560)^(3/2)+(x－525)^(1/2)=123.28
    sqrt(3)*(100-6x)+6*sqrt(400-x^2)+(24-x)*sqrt((34-x)(x-14)=(24-x)*sqrt(400-x^2)
    x*x-2024*x+2023=0
    sqrt(3)-x^2=0

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