(-m-1)÷(6-3m)=4
    x^2-4>5x+2
    -x^2+2x+3 = 0
    -x^2+2x+3
    （x-1）^2>0
    2/3x^2-4/3x-2<0
    4.053*10000000-4.053*10*39.13*x+0.1408*x^2-0.1408*39.13/1000000*x^3=2271.106*x
    1/(x-1)^2>1000
    1/(x-1)^2>10
    1/(x-1)^2>100
    x（x+1）大于0
    3x2-10x+7＞0
    （m-1)(m-2)<=0
    （m-1)(m-2)<0
    (x^2-x-6)/(x-1)≥0
    (x^2-1)(x-1)(x^2-x-2)＜0
    (x^2-1)(x-1)(x^2-x-2)
    4-4（2m-1）≥0
    4-4（2m-1）
    （2m+1）（2m+1）-4（m*m-1）＞0

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