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    (27.776+x)×2.15=55.552+76.128-x
    y^2+(24-2y)^2=169
    1.1(1.2-x)=1.2+x
    x + 1 = 1
    3x/4+675/(576x)=51/24
    3x/4+675/576x=51/24
    835*x=765*(40-x)
    e^(x)*((1)^2 + 1*(2-ln(1+1)+(1-ln(1+1)))=(x^2)*(1+1)-2*x*(1+1)^2
    e^(x)*((0)^2 + 0*(2-ln(0+1)+(1-ln(0+1)))=(x^2)*(1+0)-2*x*(1+0)^2
    2*x - (x^2) * (1 - 2*(e^(-x)/(1+2+e^(-x))))+1
    2*x - (x^2) * (1 - 2*(e^(-x)/(1+1+e^(-x))))+1
    2*x - (x^2) * (1 - 2*(e^(-x)/(1+0+e^(-x))))+1
    2*x - (x^2) * (1 - 2*(e^(-x)/(1+0+e^(-x))))+ln(0-1)
    e^x=(2+1)*(x+2)/(x-2)
    e^x=(5+1)*(x+2)/(x-2)
    (118+X)/(132+X)=0.9
    (132+X)/(118+X)=0.9
    3²+5²=x²
    x²+3²=4²
    80526=92048*x+51600(1-x)

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