X²+2X+1≤0
    4X-X²-4<0
    2X²+3X≥0
    2X²+3X≥0
    2X²+3X+10≥0
    1≥arccos（2x-3）≥-1
    x^2+x>x^3
    1≥arccos（2x-3）≥-1
    x+1/x≦2
    x+1/x≦2
    3x²－260x＋43100≤0
    x²－2x－15＜0
    100(0.78-p)/(100p(1-p))^0.5＜1.96
    100(0.78-p)/(100p(1-p))^0.5＜1.96
    3c-2＞c
    4^x-3*2^x-4>0
    3^x-x^3<0
    e^x（2x-2+cosx-sinx）<-1
    3x-11x+6≥0
    0.9x-234＜0.6(x-234）

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