Mathematics
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    (1-5x+x^2)(2-x)<0
    x^2+(2÷3)x+(1÷9)≤0
    x^2+x+1≥0
    2x^2-x-1≥0
    x^2-3x-10<0
    x^2+3x+10<0
    a+2>2*a-sqrt(a^2+a)
    a+2>2*a-sqrt(a^2-a)
    x^2-7x+10>=0
    x^2+5x+6>=0
    x^2-x-6>=0
    x^2-2-6>=0
    ((x^3)-1)/(1+x-x^2)>0
    x^2-6x一7≤0
    a^2-18a+84>0
    (X-2)(X+3)≤0
    5x-4≤7x-1
    -4X≤2
    4249+3341>3883
    32>0.12x

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