Mathematics
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    (x-2)/2>(3x-6)/5
    (2x-1)/3≤-[(x+2)/6]
    (2x-1)/3≤-(x+2)/6
    -(x-1)>2(x+1)
    2(x-4)≤3x-6
    5-2x>2x-1
    xx-3x>-1.25
    x2-3x>-1.25
    x2-3x>1.25
    0.1x^2-36x+3000≤0
    -x^2+360x-3000≥0
    1/(2-k)<0
    2x≤-1
    -x>-4
    1+2x/3>x-1
    3x>-3
    -x≦5
    (((-2/27)x^3+(4/9)x^2+(13/9)x-(56/27))/2)^2+(((-1/3)x^2+(4/3)x-(19/3))/3)^3<0
    ((-2/27x^3+4/9x^2+13/9x-56/27)/2)^2+((-1/3x^2+4/3x-19/3)/3)^3<0
    x^3>1

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