(1+0.111111)*(1+x)=(1+0.771)^2
    96=6/(1+x)+6/(1+x)^2+106/(1+x)^3
    95=5/(1+x)+105/(1+x)^2
    sin(x)cos(x)+sqrt(3)cos(x)^2=sqrt(3)
    96=6/(1+0.111111)+6/(1+0.077136)^2+106/(1+x)^3
    sin(x)=0.5
    95=5/(1+0.1111111111111)+105/(1+x)^2
    90=100/(1+x)
    6/(1+x)+6/(1+x)^2+106/(1+x)^3=96
    x/18*x=450
    X/4+(50-X)/3=15
    X/18=450/x
    x^2/1-x=0.00000045
    0.99x=22500
    x²-38x+325=0
    （32+x）25-25x=640
    1/3x+2 = -1/4x＾2+x+3
    1/3x+2=-1/4x＾2+x/3
    x－√x
    x－√x

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