(237+X)^2=3.7*3.7*(0.07*0.07*X*X+19.8*19.8)
    6/5(x-2)=7/10(x+2)
    （1+x/2）^2-1=8.16%
    1914.33X＾2-X＾3-17143.73=0
    X^2/4+X=8.16%
    x=2
    2283750x∧2＋83813625x＋524349000＝864000000
    2475000000=13.8*1600x（1176-x/2）
    x÷（1+x）^2＝25/3
    25x^2+47x+25＝0
    25x∧2＋47x+25=0
    （1+x）/（1+2%）-1=10%
    59x(x^5-1)/(x-1)+1250x^5=1000
    59x(x^5-1)/(x-1)+1250x^5=1000
    （1+x）/（1+2%）-1=10%
    1+x/1+2%-1=10%
    cox^2
    x^0.333
    6/x=-3/4x+3
    x-arcsinx

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