x+2/（x²-5x-6）＞=0
    x+2/x²-5x-6＞=0
    x+2/x²-5x-6＞=0
    3x²-7x≤10
    (3-x)/(2x+1)≥1
    4y>16
    15t^－24≤0
    5t^－8≤0
    x^-x-6＞0
    cosx＞x²+x+1
    101*x^6+7386*x^5+2010*x^4-1150060*x^3+1224705*x^2-341544*x+8336>0
    2-4x<0
    -9*x^3+516*x^2-591*x+84<0
    x^4+38*x^3+1089*x^2-532*x+16>0
    -3
    -3
    -3=
    x^2－25x－300≥0
    (1-2*x)(x+2)>0
    -x+4x-4<0

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