2a-1=-(-a+2)
    x+88/0.997=972
    (x-9.5)(x-8)=1
    (x-9.5)(x-8)=0
    x^4
    （x-12%）/2%=0.73
    0.0035=（x÷3275000）∧1.59-（x÷3275000）∧1.794
    （1/3275000）^1.59*x^1.59-（1/3275000）^1.794*x^1.794=0.0035
    0.000000000009x^5+0.00000001x^4-0.000004x^3+0.0005x^2-0.029x+53.229-44=0
    x^1.25-x^0.5=10
    0.000000000009x^5+0.00000001x^4-0.000004x^3+0.0005x^2-0.029x+53.229-44=0
    x^0.32=17
    2876.59=150*0.45*0.45/0.55/0.55/0.55*0.0000184*x/0.0025/0.0025+1.75*0.45/0.55/0.55/0.55*1.185*x*x/0.0025
    a^2+6a =18
    16x²-96x+9=0
    20*(1+2t)*(1-0.3t)+8*(1+6t)*(1-0.25t)=[20*(1+2t)+8*(1+6t)]*(1-5/18t)
    y＝lg1
    x^3-0.12x-1.2=0
    （X-12%）/2%=0.73
    X-12%/2%=0.73

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