Mathematics
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    9×a^2-a-28≤0
    (2x-1)/(x+2)<1
    (21.3+x)-[(21.3+x)*20%]>21.3
    21.3+[(21.3+x)*20%]>21.3
    21.3+[(21.3+x)*20%]≥21.3
    abs(x+2)(3x-1)≥0
    (x+7)/(x^(2)-2x+3)≤1
    -x^2+7x>6
    2+1/x≥0
    (1+4x)/(x-2)≥1
    1≤abs(x-2)<7
    2x^2+2-5x>0
    x^(3)-x-4=0
    6x>0
    9x^2-6x+4>0
    x^2-x+0.25<0
    x(274+85)(x+25)>x(282+25)(x+85)
    x*(274+85)*(x+25)>x*(282+25)*(x+85)
    m^2-5m+7≥0
    500+x=(1500+x)*51%

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