23494.2=(-1.131*(ln(85855.47094/x))^3+13.635*(ln(85855.47094/x))^2-30.594*(ln(85855.47094/x))+29.267)*x
    x=-1.131*(ln(85855.47094/x))^3+13.635*(ln(85855.47094/x))^2-30.594*(ln(85855.47094/x))+29.267
    23494.2/x=-1.131*(ln(85855.47094/x))^3+13.635*(ln(85855.47094/x))^2-30.594*(ln(85855.47094/x))+29.267
    (1+2.9%)*(1+x)=(1+3.2%)^2
    23494.2/x=-1.131(ln(85855.47094/x))^3+13.635(ln(85855.47094/x))^2-30.594(ln(85855.47094/x))+29.267
    322162.2+464.38+1241+X*0.00125+4345.1+200+（322162.2+464.38+1241+0.00125X+200）*0.25+【（（322162.2+464.38+1241+X*0.00125+4345.1+200+（322162.2+464.38+1241+0.00125X+200）*0.25）*1.1）/0.9978】*0.002=X
    322162.2+464.38+1241+X*0.00125+4345.1+（322162.2+464.38+1241+0.00125X）*0.25+【（（322162.2+464.38+1241+X*0.00125+4345.1+（322162.2+464.38+1241+0.00125X）*0.25）*1.1）/0.9978】*0.002=X
    322162.2+464.38+1241+X*0.00125+4345.1+（322162.2+464.38+1241+0.00125X）*0.25+【（（322162.2+464.38+1241+X*0.00125+4345.1+（322162.2+464.38+1241+0.00125X）*0.25）*1.1）/0.9978】*0.002=X
    4.3x-2.8=0.3x+5.9
    102.873=5/(1+x)+105/(1+x)^2
    105.6478=6/(1+x)+6/(1+x)^2+6/(1+x)^3+106/(1+x)^4
    102.873=5/(1+x)+105/(1+x)^2
    3*s^4+16*s^3+26*s^2+16*s=0
    102.873=5x
    4（x+8.2）=40.8
    8x/9=9
    （3+2）x=10
    240/X=X+1
    2.5 x+4.5×（7.6-X）=24.2
    a+a*13%=16428.4

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