0.8129x+1-x=0.9966
    0.8129x+1-x=0.886
    a^4=2022
    X+30%X=713
    X+30%X=817
    2.53x=6x-4
    2.73x=6x-4
    x^3-3x^2+6x+1=0
    x^3-3x^2+6x+1=0
    2x^3+11x^2+20x+8=0
    x^2+11x-242=0
    x＋（x*0.048）=161
    8x^2-(4x)*(x-2)-(x-2)^2=0
    -4x^3+25x^2-20x+4=0
    x=(1.25*(e^(6*x)+1)/(e^(6*x)-1))-(1.25/3*x)
    x=1.25*(((e^(6*x)+1)/(e^(6*x)-1))-(1/3*x))
    x=1.25*((1/((1-e^(-6*x))/(1+e^(-6*x))))-(1/3*x))
    x=1.25*((1/((1-e^(-2*x))/(1+e^(-2*x))))-(1/3*x))
    6-x＝√(xx+16)
    A*A+A＝210

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