abs((3+x)/(3-2x))<1
    log(a,0.5)>2
    3x-10+7>0
    121212>x^2
    2x-(x+10)>5x+2(x-1)
    abs(lg4x)
    abs(lgx)
    100x^3-600x^2+901x-0.4≤0
    100x^2-600x+901≤0
    100x²-600x+901≤0
    2X-X^2大于0
    2X-2^2大于0
    2X-2^2大于2
    -2
    <-2a^x<1
    25x²-300x-64＞0
    3x^2-8x>7
    x^2≧3
    5X2一x一6＞0
    3x^2－2x≥0

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