e^x=x+2
    x^2+0.2*x-0.2=0
    -xxx+5xx-6x+1
    B*B+B
    xx-4x+2
    xx-5x+2
     x = -2.01×lg(2.76×10^-6+1.17×10^-7×x)
     x = -2.01×lg(2.74×10^-6+1.17×10^-7×x)
     x = -2.01×lg(3.07×10^-6+1.05×10^-7×x)
    xx-3x+1
     x = -2.01×lg(3.19×10^-6+1.01×10^-7×x)
     x = -2.01×lg(3.43×10^-6+9.41×10^-8×x)
     x = -2.01×lg(3.44×10^-6+9.38×10^-8×x)
     x = -2.01×lg(3.43×10^-6+9.41×10^-8×x)
     x = -2.01×lg(2.77×10^-6+1.17×10^-7×x)
    28.77+6.85x^2+38.13x+52.74=65.36+70.25x+45.65x^2
     x = -2.01×lg(2.74×10^-6+1.18×10^-7×x)
     x = -2.01×lg(3.08×10^-6+1.05×10^-7×x)
     x = -2.01×lg(3.06×10^-6+1.05×10^-7×x)
    11x²-80x+135=0

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