144（4-9k2）>0
    81k4+16>0
    16k4-4(1-k2)(-4k2-1)>0
    4x2-4(1-x2)(-x2-1)>0
    a^2-2a-1≥0
    a^2-a>0
    98*t^3 - 63*t^2 + 3<0
    98*t^3 - 63*t^2 + 3>0
    - (128*(14*t - 6))/((7*t^2 - 1)*(7*t^2 - 6*t + 1)^2) - (1792*t)/((7*t^2 - 1)^2*(7*t^2 - 6*t + 1))>0
    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

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