Mathematics
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    4x²-20x+9<0
    abs(x/(x+1))>x/(x+1)
    abs(1-2x)<=7
    x^(-0.5)
    
x^(-0.5)>x*4000^(-1.5)
    x^(0.5)>x*4000^(-1.5)
    x^0.5>x*4000^(-1.5)
    x^0.5>x*4000^(-1)
    abs(x+1)+abs(x-4)>7
    abs(1-2x)>3
    abs(x+3)<4
    abs(2x-3)<3x-2
    x*x*x+3x-5>0
    x*x+3x-5>0
    (4-x)/(x²+x+1)≤-1
    (x-1)/(x²-4x+5)>1
    3x+3>3
    (2x-1)/(x+2)≤0
    (3-2x)/(x-1)<0
    22+208-162-10-25-18-18×6%/12-120×9%/12+W-W×6%/12≥20

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