-4x＜16
    1<=(7x+40)-8(x-1)<7
    x^2+x+2<0
    -x^2-x+2<0
    D×D－4＞0
    x^2+2x-8＜0
    4-sqrt(x^2-6x)>=0
    x^2-6x>=0
    19a^2+126a+176<0
    x2－x+2>0
    x-2
    x-2<2
    0＜－m＋（m^2－2m－1）＾（1／2）＜1
    log(sinx,cosx)＞0.5
    log(x,ex)＞5
    !(x)＞6
    4x^2+8x+4/x^2+1>0
    a^2+0.25a-3.5＞0
    a2+0.25a-3.5＞0
    （100-10X）×（2+X）＞320

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