sin（ln(x)）
    (24+x):3-(4x+8):3=5
    X^3-3X+1=0
    0.0112x/1.01-x=200000*0.06*1.12/1.06-200000
    x/1.01*0.01*1.12+(200000-x)=200000/1.06*0.06*1.12
    x/1.01*0.01*1.12+(200000-x)=200000/1.06*0.06*1.12
    ((24+x)：3)-((4x+8)：3)=5
    ((24+x)：3)-((4x+8)：3)
    xlnx
    (163+312)/31*x+177/31*(x+15)+124/31(x+30)=1266
    (163+312)/31*x+177/31*(x+15)+124/31(x+30)=1266
    x^9＝3^x
    x^9＝3^x
    3^x＝9x
    n^2-n-63=0
    n2-n-63=0
    x^2+1.3*10^(-7)*x-1.3*10^(-13) = 0
    x^2+1.3*10^(-6)*x-1.3*10^(-13) = 0
    x^2+1.3*10^(-7)-1.3*10^(-13)=0
    x^2+1.3*10^(-6)-1.3*10^(-13)=0

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