-2x＜3
    x＾2-x-lnx+e＾sinx-1＞0
    1-x╱x≥0
    -3/x＞3
    2x+6＜0
    -2/1x＞2
    2x^-5x+2大于0
    2x-5x+2大于0
    -2/5<-4a
    5x+2>0
    (11/13)^x<0.001
    x^3+8x-9<0
    8x-4>9x-15
    4x-9x-3<2
    2x-1
    3-3x>2x+18
    x-10>2-3x
    2x<-4
    3x-3<4x
    2x+5>5x+2

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