3x=12
    （100+x）*[8-（x-100）/10]=1200
    （1-x）58+88x=64
    16.5×a×0.6=5.6
    lnx^x^-1
    29.7×a×0.6=9.9
    2x/8=5+x
    3x/8=5+x
    4x＾3+x＾2+36-36x=0
    33×a×0.6=13.2
    2x*8=5+xx
    27.5×a×0.6=9.9
    X+103.65-104.12等于52.33
    X+103.65-104.12
    40*30+(60-x)*20+10x=2200
    （x-198468030)*0.0327%+(-6.01%*x+23134305)*0.0655%-27047=0
    3200+（60-x）*100+90*x=9000
    （x-198468030)*0.0327%+(5.3%*x-23134305)*0.0655%-27047=0
    （x-198468030)*0.0327%+(5.3%*x+23134305)*0.0655%-27047=0
    （x-198468030)*0.0327%+(-6.01%*x+23134305)*0.0655%-27047=0

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