1≤1÷1-x≤2
    4x^2+8x+4≤0
    3x^2-8x+8≥0
    3x^2-4x+1≤0
    abs4-x≥-2
    -abs3-2x≤5
    (x-1)^4x^2(x+1)^6÷(x-3)^3(x+4)^5≤0
    (9-x)^55(10-x)^66(12-x)^77÷(7-x)^30(8-x)^40 = ≥0
    (x-2)^5(x^2-2x-3)÷(x-1)(x+1)^3≥0
    (x-2)^5(x^2-2x-3)÷(x-1)(x+1)^3
    (9-x)^55(10-x)^66(12-x)^77÷(7-x)^30(8-x)^40
    5-2x÷3≥-1÷2
    14.01+X-X*6%/12≥20
    (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))

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