x*x-x-12<0
    3*x*x-x-4>0
    （2x-3）（x+1)>0
    abs(3x-4)>1+2x
    abs(2x+3)+abs(2x-2)≤8
    5>abs(2x-3)≥1
    abs(2x-3)≥1
    abs(2-x)≥3
    abs(x+2)<3
    abs(x-1)+abs(x-2)
    abs(x+1)>abs(2x-1)
    abs(4x-3)>2x+1
    0≥2x-1/x-2
    2≤abs(3-2x)<9
    abs(3-2x)≤5
    abs(2x-5)>2
    abs(x-10)<3
    12x^(2)－6x＋1>0
    x^(2)－6x＋3<0
    -2x^2-2x+3<0

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