（X/1.13）*13%+（（3950497.88-X）/1.06）*6%=297457.53
    （13-4/x）+3=21
    （13-4/x）+3=27
    e^x-x-1
    55/（3+x/27）=11
    X/87-30/500-2/44.7=0.001905（X+32）
    X/87-22/500-2/44.7=0.001905（X+24）
    X/87-15/500-2/44.7=0.001905（X+17）
    z^3-2z^2+2z=0.9999
    xxx+8x-8=0
    z^3+z^2+z=0.001
    z^3-2z^2+2z=0.99
    z^3-20z^2+200z=999
    z^3-2z^2+2z=0.999
    z^3-2z^2+2z=65/66
    （x-95）+（x-102）+（x-100）+（x-99）+（x-104）=x
    1/√(2πx)*e^(-x/2)=0.0001
    100*x*222.64/(x*222.64+(1-x)*0.5*335.17)=93.618
    100*x*222.64/(x*222.64+(1-x)*0.5*335.17)=92.923
    335938.50 =（X/1.13）*13%+(( 4068588.51 -X)/1.06)*6%

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