-4x^2-1<4
    4x^2-36x+45＜0
    -2x^2+15x-616≥0
    -2x^2+157x-500≥1300
    k/2>1
    a＾2－2a－3＜0
    a＾2－2a－1＜0
    3a＾2＋6a＋3＜0
    5x^2-2x-3＜0
    2-x＜x-5
    -3x^2+x+1＞0
    9>3a
    4.609*x^3-80.137*x^2-464.685*x+817.891>0
    1-1/a + ln1/a ≥0
    (1+X)/X>0
    1+X/X>0
    1/X+1>0
    7.598-y-y*12%/12*2≥3
    3-x-0.7-0.45(sqrt(0.9+x)-sqrt(0.9))>0
    x^2-x-6 >0

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