x=1/ln((1+sqrt(5))/2)
    x=1/(ln(1.2938)-ln(0.2938))
    2^x=sqrt(4-x^2)
    x^(sqrt(x))=5
    sin(x)+x=5
    213007.079+（y-y*0.85）/1.05*0.05=y
    (33.8*2)*x/33.8=64.22
    (33.8*2)*x=64.22
    (33.8*2)/x=64.22
    33.8*2/x=64.22
    2^x=x^2
    2^x+x=4.5
    2^x+x=3
    （2x-1）÷（3x+4）=60%
    566.8+(1054-566.8)*(X-20000)/(40000-20000)=886.68407
    2x^3-x^2-2x+1=0
    x^4
    1.5w=0.965-0.4825w²
    1.5w=0.97-0.485w²
    0.3w=0.97-0.0194w²

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