（26.127+x）×2.15＝52.254+69.681-x
    （26.127+x）×1.95＝52.254+69.681-x
    （26.127+x）×1.75＝52.254+69.681-x
    （26.127+x）×1.55＝52.254+69.681-x
    （26.127+x）×1.55＝52.254+69.681-x
    x-2.47*100000000000/x^2=21321.43
    159.5666=26.58333*（2.8-x）+95.4802
    x-300=2.8554*x^(2/3)
    x-290=1.4118*x^(2/3)
    (26.127+x)×2.55＝52.254+69.181-x
    （26.127+x）×2.35＝52.254+69.181-x
    （26.127+x）×2.15＝52.254+69.181-x
    （26.127+x）×1.95＝52.254+69.181-x
    （26.127+x）×1.75＝52.254+69.181-x
    （26.127+x）×1.55＝52.254+69.181-x
     219×219/321/321×（1—x×x） = 3.1415926×x×3.1415926×x
     234×234/248/248×（1—x×x） = 3.1415926×x×3.1415926×x
     147×147/101/101×（1—x×x） = 3.1415926×x×3.1415926×x
     252×252/316/316×（1—x×x） = 3.1415926×x×3.1415926×x
    24×24/43/43×（1—x×x）=3.1415926×x×3.1415926×x

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