r*r-r-1/2=0
    x^3=x+1
    (-1/2)^(2x)+(-1/2)^(x)-(119/64)=0
    (1/2)^(2x)+(-1/2)^(x)-(119/64)=0
    (x-2)/4-(2x-1)/6=1
    x-2/4=1+(-2x-1/6)
    x-2/4-2x-1/6=1
    0.25x-0.5-12x-6=1
    2x=2
    173.4-81.9=0.5x
    84.1= 35.411ln(x) - 7.034
    50 = 35.411ln(x) - 7.034
    2.04762*x^(5/3)+132.8125*x=2880000
    X*0.5+81.9=173.40
    40÷s^2÷(0.04*s^2+1)÷(0.0625*s^2+1)=1
    s^2*（0.04×s^2+1）*（0.0625^2*s^2+1）=1/1600
    s*（0.2s+1）*（0.0625s+1）=1/40
    0.2264339*x^(5/3)+6.1125*x=9216000
    0.2264339*x^(5/3)=921600
    84.1 = 38.134ln(x) - 6.8087

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