2*x^2-3*x-2<=0
    x^2+5*x+6<0
    4x²－13x＜0
    3613x<=78
    2√2-x²-x≤√10
    π>x
    x²-9x+18≤0
    （x-2）（x-4）≤0
    0.1x＞7
    0.78|234x＞1
    x≥ x ^ 2
    x-3≥x^2
    x-3≤x
    x - 3 ＞x
    x-3＜x
    sin（x/3）＞cosx
    x+2<3(x-1) 2x>5(3-2x) (x+3)/4+2≥(x-4)/3
    x^2+x+5≤5x+1
    -x^2-4≥4x
    -x^2+4≥4x

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