16/9*9
    16/9*9＾2
    16/9
    3+2（2x-6）<=-8x-2-5x
    3(2x+5)<2(4x+6)
    3＜abs（3/4x-5/6）＜8
    1 ≤abs（x-2）≤7
    1 ≥x
    1＜＝x
    -2＞10-x＞-4
    2＜abs（x-10）＜4
    -3＞5/6-3/4x＞-8
    3＜3/4x-5/6＜8
    10-4(x-3)≤2(x-2)
    x+1/1-x>=0
    sinx>-1
    x^2+x+2>0
    3+5*（X-32）
    3x−7>20
    14≥3x−7

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