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    x/1-e^x
    x/1-e^x
    sqrt(x^3+x+9)=0
    2/3=exp(x+2.7)/1+exp(x+2.7)
    X^2+10*X+50 = 0
     500^2+x^2 = (2500-x)^2
     500^2+x^2 = (2500-x)^2
    235.4501*(13.42+x)^2.61396-235.4501*(13.42-x)^2.61396 = 118790.22
    235.4501*(16.3+x)^2.61396-235.4501*(16.3-x)^2.61396 =118790.22
    √3x+x=2 √3
    lnx0=-x0
    100x+550=120x-630
    x^2-x+e=0
    (3×√170×x+√1560-170x²)÷10=2√170×x
    (3×√170×x+√1560-170x²)÷10=2×√170×x
    x*x+132*x-1089=0
    (x-1)*ln(x)=1
    4.9x²-(2*9.8÷ 90)x=2+0.02*9.8÷9
    4.9x²-0.2177777x=0.2177777+2
    x/x-750=2

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