Mathematics
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    [(2-t)^3-t^3]*t*(2-t)^2<0
    x2+8x-1>=-1
    -a-1-sqrt(8a+8)/2>-12
    -a-1+sqrt(8a+8)/2<-1.5
    lnx+3<0
    -2x²+4x-3≤0
    2x²+4x-3≤0
    2x² -11x+2<0
    2x²-5x+2<0
    2x²-11x+2<0
    (5a-3(6-a)/5)/2-(6-a)/5>0
    (5a-3(6-a)/5)/2-(6-a)/5>0
    (100-x)÷x≤0.05
    x÷(100-x)≤0.05
    (x +1)(x +2)>0
    5x^2-14x-3≥0
    -3x+5x+28≥0
    3x²-5x-48≤0
    -3x²+5x+48≥0
    x+2>2

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