2ex+2+xex+2>0
    4X≤12
    3sin（2x-2π/3）＞0
    (k^2/16-1)^2＞k^2/16
    0.55（x-208)＜x-383
    0.55x-208＜x-383
    5x^2+2x<5
    （x+2）（3-x）<1
    -x^2+32x-272＜0
    abs(2x^3/(3x^2-1))<=1
    abs(2x-2)-abs(x+2)>=6
    abs(2x-2)-abs(x+2)>=6
    1-0.99^n>0.95
    510+129n＞1100-40n
    X2-2x+3<0
    x^2-2x+3<0
    X2-2x+3<0
    x^（x-1）<1
    x^（x-1）≥1
    abs（x）+x≤0

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