x-2/（x+1）2（x-2）<1
    abs(x－1)＜1
    x^2－2x≥0
    2x^2+x＞0
    x^2－2x+3＜0
    (35/36)^x >= 1/2
    x^2-9x+1＞0
    x/（5-2x）＜0
    x/5-2x＜0
    x²-3x+2≤0
    4k*k+2k+3＞0
    x^2-7x+6<0
    x-2（x-1）≤4 1-3-3x/2＜x
    (10+k)^2-4*2*8<0
    x^2+6x+2>9
    x²-2x-3＞0
    （y+1）/6-（2y-5）/4≥1
    8-8k^2<0
    4k^2-8<0
    k^2-4k>0

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