Mathematics
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    (x+2)(x-1)<0
    2a-3≥(a-1)(a-1)
    x²-2x+3>0
    x(3-x)<x(x+2)-1
    -2x²+3x+2>0
    (3x-1)/(2-x)>=1
    8/3k≥16
    x+1/-6x+3≤0
    m^2-4m-28<0
    m2-4m-28<0
    64<=420+6/a<=100
    x^2-4x-12<0
    3a+4<0
    9-t>√(12t)
    -3x^2+8x-4≤0
    k*2-3k<0
    (3x-1)/(2-x)>=1
    5a-10+8<6a-6+7
    (20-3/8x)x+(100-x)(1+2.5x%)*10>1400
    (20-3/8x)x+(100-x)(1+2.5x%)>1400

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