10/[w×w×(1+w×w)×(1+0.2w×0.2w)]＝100
    10/[w×w×(1+w×w)×(1+0.2w×0.2w)]＝1
    10/[w×w×(1+w×w)×(1+0.2w×0.2w)]
    1/[w×w×(1+w×w)×(1+0.2w×0.2w)]＝1
    a*a(1+0.04a*a)(1+0.0025a*a)=36
    x^4+2x^2-2x+1=0
    X^2-(x-75)^2=132.5^2
    X^2-(x-75)^2=264/2
    68.77=-14.51ln（x）+34.342
    4.5201=（（28.02*0.639（x+0.1））/（1+0.639（x+0.1））*（（100-6.66-1.14）/100）*（1/(1+0.31*1.14)）+（（0.76（x+0.1））/（1.3*0.101325））
    35x^2+x-4=0
    4(1+16.25x)/x(1+100x)=1
    1.2x/(1-0.2x^2)=0.84
    364.314*（1-x）^2=x
    arctan0.1w＋arctan0.2w＋arctan6.6w－arctan2w＝90
    x/（1-x）2=364.314
    0.9943=（1-1/(1+x)^39）/（1-1/(1+x)^40）
    20lgx＝10.4
    arctan0.1w＋arctan0.2w＋90＝133
    arctan0.1w＋arctan0.2w＋90＝130

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