Mathematics
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    ((a-1)/a)²+(4/a)²>0
    (-a-1/a)²+(4/a)²>0
    2a²+a-1>0
    12(x+1)^2+e^x>0
    -1+2x>-x
    ln(2-X)≥0
    1-X^2≥0
    ln(2-x)>-1
    2-x>-1
    2-x<1
    (x-3)×(x-7)>0
    x^2-35*x+250<=0
    x^2-35*x+500<=0
    (3x-4)/2-(x+1)/3>=2
    x²-2x+x-2<4
    (x+1)(x-2)<4
    -3x²+4x+15≦0
    -3x^2+6x+1大于等于0
    (1-2y)²-4(2y-1)(3y+1)≥0
    23y²+2y-5≥0

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