7+2x>=6+3x
    (2x+1)/3-(1-2x)/2<1
    2x+2-3-6x<6
    3>2m+3
    2d^2+47d+210<0
    x^2-3x-10≤0
    x^2-2x+3<0
    x^2+4x+4>0
    9x^2-16x-8
    x^2+4x+4
    -2x^2-3x+5<0
    3x^2-7x≤0
    k^2+16k-9>0
    k^2+4k-9>0
    60×4-4x<42×4
    1/2*((2＾x)＾2)-3*(2＾x)+5<13
    （2x+3）*（x+2）<1
    2x+3/x+2<1
    x+1╱x-1≥0
    1╱x-2＞1

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