（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
    0.3w=0.97+0.194w²
    0.3w=0.97-0.194w²
    arctan3/2w/1-w²/2=44
    1-x
    212882.08+（y-y*0.85）/1.05*0.05=y
    (x)^(1/3)=2(1/x)^(2/3)
    3=x(32^(1-2x)+3)
    （1200/x-4)^1/3=2(1200/x-4)^(-2/3)
    X（X+25）=5850
    （17+5）*500+850=42.7*x
    （17+5）*x+850=42.7*x
    （17+3）*x+850=42.7*x
    X/lnX+1

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