-⅓≤x
    （3-2x）-（5+3x）（x-1）²＞0
    x²-2x-2╱x²+x+1＞1 x²-2x-2╱x²+x+1＜2
    x²-2x-2╱x²+x+1＞1
    x²-2x-2╱x²+x+1＞1
    x^2<2506
    x^3-4x<0.1
    x^3-4x<0.2
    x^2-85x+3995<=0
    (1/2)^a<8
    （1/2）^a<8
    (X+2)(x-3)>0
    4^x+4^-x≤2^x+2^-x+7/4
    4^x+4^-x≤2^x+2^-x-7/4
    -5x<2x+1
    -5x<2x+1
    x^3+6*x^2+7*x+12>=0
    3*p＾2-2*p＾3≦0.01
     2 * ( x + 2 ) ≤3 * ( x + 3 )
    2(x+2)≤3(x+3)

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