（x-198468030)*0.0527%+(5.3%*x+23134305)*0.0079%-27047=0
    （x-198468030)*0.0527%+(5.3%%*x+23134305)*0.0079%-27047=0
    （1+x）*（1+x）=1.44
    （x-198468030)*0.0527%+(-6.01%*x+23134305)*0.0079%-27047=0
    1/x×sinx
    x+7/2=7/9x
    x+7/2=3/4x
    x+7/2=4/3x
    x+7/2=9/7x
    x+2/7=7/9x
    5x^2-6x+7
    16.5×a×0.6=5.5
    5（154/5+y）/12.1-154/11=3
    5（154/5+y）/12.1-154/11=1
    154+5y/12.1-154/11=3
    154+5y/12.1-154/11=1
    2X-50=110
    2X-50=110
    2X-50=110
    x/12.1-154/11=3

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