a∧2＞1
    4x²+2x+1＞0
    2x^2-5x-3<0
    (a-9)(a+1)≥0
    (a-9)(a+1)<0
    2x>0
    (2m-2)/(3m+3)<0
    m²≤3+√2
    -1/(2x)<=0.1
    4x-6＜1
    x^2+7x>0
    t（t-59/12t）+6<0
    3x+2>10
    4-x^2>0
    x²+x-12≧0
    (2x-1)²≧0
    （x-2）（x-3）≧0
    3x+2>0
    -x²+2x-2/3＞0
    x（1-x）＞0

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