2x²+11x+6＜0
    4x²+4x-3＞0
    6x²+x-1＞0
    3x²-7x+2＞0
    x²-3x+5＞0
    -6x²-x+2＜0
    -x²-2x+3＞0
    -x²+4x-4＞0
    x²-4x+5＜0
    10x²-33x+20＜0
    -2x²+6x-5＜0
    60/x≥12
    x^（1/3）＜1
    x^（1/3）＞1
    1+3x
    abs ( x + 1 ) - abs ( x - 3 ) >-4
    abs(x+3)+abs(2*x-3)>3
    1+x＞2
    m+3≤2m-1
    3x+2＞2

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