x(1-2x)≥0
    (2-x)(4+x)≥0
    (x+2)(x-1)≤(x-2)(2x+1)
    (x+2)(x-1)≥(x-2)(2x+1)
    (x+2)(x-3)≤6
    x²＜1
    x≦25+86x^2
    2.7^-0.1＞0
    2.7^x＞0
    e^x＞0
    e^m＞0
    -50-（100+x）*1%+X≥10
    2x-8<2x<20
    abs(2x+3)>4
    2^x>x^2
    −1.19cos(−x+1.775)>0
    −1.19cos(−x+1.775)>0
    −1.19cos(−x+1.775)>0
    4X+1＞X^2
    X^2+1＞4X

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