(x+1/2)^>1/4
    (x+1/2)^<1/4
    4+3x-2x^2≥0
    9x^2-12x>-4
    (12.5x*x/(4-x*x)-3x*x+2)/(25x/(4-x*x)-5*x)>(2.5x*x*x/(4-x*x)+x*x+1.5x+1+(2*(25x*x)/(4*(4-x*x))-2.5x*x+x*x+1)/(1+x*x))/((-5x*(1-5/(4-x*x)))/(1+x*x))
    ln((x+3)/(x))<0.0015
    (12.5*x*x/(4-x*x)-3*x*x+2)/(25*x/(4-x*x)-5*x)>((15+x*x/2)*x*x*x/(4-x*x)+1.5*x*(1-x*x)/(4-x*x)+2*x/(4-x*x)+x*x+1)/((-5*x*x*(1-5/(4-x*x)))/(4-x*x))
    (12.5*x*x/(4-x*x)-3*x*x+2)/(25*x/(4-x*x)-5*x)> ((15+x*x/2)*x*x*x/(4-x*x)+1.5*x*(1-x*x)/(4-x*x)+2*x/(4-x*x)+x*x+1)/((-5*x*x*(1-5/(4-x*x)))/(4-x*x))
    4<(y+1)/2<5
    5<(y+1)/2<4
    (x+15)/2>x-3
    (3y-2)/2+1>(y-2)/2
    (x-2)/3-x<-2
    2x-(1+3x)/2<1
    x-4<1.5(2x-1)
    5x+2>3(x-1)
    5x+2<3(x-1)
    5x+6(30-x)<162
    8x+3(30-x)<190
    (x-3)/2

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