（3x+1）/2－1≥x
    2x－1>5
    （x－1）/3≤（x+1）/9
    4x>2x－6
    （3x－2）/5≥（2x+1）/3－1
    （3x－2）/5≥（2x1）/3－1
    （3x－2）/5≥（2x－1）/3－1
    4x－3>x+6
    X+2≥3x/2+1
    lna＋a＝－1
    p+4≤1
    (60-2x)(5+x)>300*1.5
    60x+192<109.9x^3
    {4.5-2x}/1.5-{3-7x}/2≥{3x+0.2}/0.3
    log(3,27)
    arccos0.5
    t
    {1.8-8x}/1.2-{1.3-3x}>{5x-0.4}/0.3
    sqrt(2-4x) <= 0
    32-x÷30=1/10

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