-0.05<=(500x-0.01357-503.53533x+252.62243x^2)/(500x)<=0.05
    -0.05<=(500x-0.01357-503.53533x+252.62243x^2)/(500x)
    2t^2+11t+18<=0
    abs(3x+3)>=4-abs(x-2)
    (x＋4)(x-5)＞0
    1.05 ^ x > 1 + 0.1 * x
    x2一4x一12X＞0
    (z+4)/(z+5)-(z-9)/(z-5)>0
    4x/(x-8)*(x+6)>0
    （x+2）/(x-8)<0
    －3≤1/x≤1/3
    （X十1） X≤4046 ≤（X十2）（X十1）
    （X十1）≤4046≤（X十2）（X十1）
    xcosx-sinx<0
    (x+2)^2-1≥-x-1
    2-4/(x^3)>0
    2-4/(x^3)>0
    （2x-5）（18x-125）+4≥0
    （2x-5）（18x-125）+4≥0
    4x²-4x-15＞0

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