x+3>5
    abs（x-2）/（5-x）≤1
    4(a+1)^2-4a^2≧0
    3x＾2－20x＋12＞0
    500*1.5<=(500-x)(1+0.005x)
    1-a/a^2>0
    a-1/a^2>0
    4a-a/a^2>0
    91x^-78x-10000>0
    91x*-78x-10000>0
    4.9x^2-30x+40<0
    -3x^2+5x-4＞0
    -0.5*（sqrt(a^3+12)+a）<2
    1-4x＜0
    x^2+4x>0
    (m-2)^2-20+4m>0
    x^2+9x+24>0
    2*x^3-(6*66+1)*x^2-2*66*x > 0
    2*x^3-(6*67+1)*x^2-2*67*x > 0
    2y^2-2y-1>=0

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