x(1-2x)≤0
    x(1-2x)≤0
    x^2+8x-7>0
    x^2+3x+7<0
    -10+2(1-x)<3(x-1)
    (X-1)/2
    3(x+2)>=2x+5
    1-x/2>=(1-x)/3
    6x+44（10-x）小于等于47
    1-x/2>=(1-x)/3
    4-x-5<0
    (x+1)(x+2)<(x+1)(2-x)+1
    (2x-1)^2<4
    -3x^2+5x-4>=0
    (x+2)/(x+1)>=2
    x+2/x+1>=2
    −cos(−x+101.72)<0
    n(n-1)＞365^n-1
    2x^2+2x-3<0
    abs(x-2)-abs(4-2x)<=-1

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