m*m-2m+300=0
    11X^2-145X=-156
    5y-2y+(20-2y)=65
    2a=14-a
    1/x=2x-1
    3/x=-x+2
    1.063=(0.285+0.005x)*x^1.5
    0.01063=(0.285+0.005x)*x^1.5
    lg(x)=6.56
    2/x=x-5
    100+4*x＝150+3x
    225xx-135325x+2106800=0
    5y+6-8y=3y—12
    6/x=x-2
    x×0.8=435
    (x-215)/ln[135/(350-x)]=16.67x-4608.45
    4x^2/（0.1-x）（6-4x）＝10^（-12.36）
    e^x=sqrt(1-x^2)+1
    28x-100-x*x=0
    3.5x+x=9

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