2x+1/x-2
    x（4-x）=4
    （50-x）（500+20x）=30000
    （50-x）（500+20x）=28000
    0.5x²-2.5x+3=-0.5x+3
    1.75=(1/6)×x^2-17/12×x+2/3
    X - （X ×0.05 ）=80000
    x-x*6%=359700
    x*6%=359700
    x*0.06=369700
    x*0.06=369800
    a^3-24a+32=0
    -2x㏑x-x+4xe∧x+2x²e∧x-㏑x-1-2x-㏑2＝0
    x＾2-33x+32=0
    x²（1+2㏑x）＝1
    2^x+2^(x-1/2)=1
    1*（1+x）=0.5
    (x+0.2)^2=x
    2x+2-6=13
    7575.75*x=1-(1+x)^(-365)

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