3b^3+13b^2+11b-9<0>
    3b^3+13b^2+11b-9>0
    4x^2+1>=0
    3x*x*x-8x*x+7x-2>0
    x^2<=2
    -1<=lnx
    -1<=lnx<=1
    sinx<=1
    sinx<=1
    3x-2>=0
    (2x+1)(x-5)>6
    x+13.57x^（2/3）≥43.2
    x+13.57x^（2/3）≥198.1
    x+13.57√x^2≥198.1
    x+13.57x^2/3≥43.2
    x+13.57x^2/3≥198.1
    57x^2/3≥198.1
     ( 4-2m )/( m+5 ) ＜0
    ( m-3 )/( m+5 ) ＞0
    x-3＞2

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