-6x^2>41x+63
    -2x^2-5x-2>0
    -4x^2-48>-32x
    0>8x^2+26x+15
    0>-5x^2+18x+35
    -24>-x^2+2x
    x乘以x-6小于0
    x+5大于等于2
    4x-1大于7
    4x+28-8（x-28）大于等于
    4x+28-8（x-28）大于1
    4x+28-8（x-28）大于28
    4x+28-8（x-28）大于等于1
    0>15x^2+39x-18
    8x^2>12x-4
    2x-1÷2x+1≥0
    0<(x+3)(x-2)(x-1)<1
    0<(x+6)(x-2)(x-1)<1
    x^2≥2.33×10^－8×(.0.1－x)
    3^2x>1

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