-2x^2+x+3≤0
    -2x^2+x+3≥0
    x^2-5x+6＞0
    4x^2-4x+15＞0
    x^2+2x＞-x^2+3x+1
    3a^2-2a-4<0
    x<0.004<1.15X
    0＜-m-3-√m2+4m-5＜1
    26700+X－X*10%/12*3 ≥50000
    11x+4<15 12x-7>-25
    31.3+X-X*1.5%≥60
     x➗3.0625≧28
    (0.5n-1)/3<=9 (0.5n-1)/3>8
    m2-m<(999-1)/6
    m2-m<(999999999999999-1)/6
    m^2-(1-m)^2<9
    x+1/x-2≤0
    x+1/x-2≥0
    33×22＜57
    abs(2x-1)<-x

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