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
    -6.54963t^3+7.094244t^2-4.9597t+0.03942=0
    -6.54963t^3+7.094244t^2-4.9597t-0.03942=0
    -6.54963t^3+7.094244t^2-4.9597t-0.03942=0
    x*0.57*2.41*1.01*1.3=1.4
    x*0.57*2.41*1.01=1.4
    160000（1-x）（1-x）=x
    Xxxxx18
    X^3-10x^2-50=0
    317400+464.38+1241+X*0.00125+4345.1+200+（317400+464.38+1241+0.00125X+200）*0.25+【（（317400+464.38+1241+X*0.00125+4345.1+200+（317400+464.38+1241+0.00125X+200）*0.25）*1.1）/0.9978】*0.002=X
    317400+464.38+1241+200+X*0.00125+4345.1+【（317400+464.38+1241+200+X*0.00125+4345.1）/0.998】*0.002=X
    3（2x-1）-（-3x-4）（3x-4）
    10%=x/(1-x)
    180+arctan(20/x)-90-arctan(1/3)-arctan(12.588*20/x)-arctan(0.158881474)=35
    x+5/900=1.5×x/500
    3X^2+25x-6300=0
    0.8x+20=x
    20+x*0.4=0.8x
    10x除2＝6乘8除2
    -7.81691493t^3+8.315228022t^2-5.37795594t+0.876087388=0

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