2x/(x-1)<1
    -10(x^2)-22x+50x+110>150
    -10(x^2)-22x+50x+110>200
    -10(x^2)-22x+50x+110>100
    5.5y+((1-(1/60+1/90)y)/(1/90)*2)<=186
    X2-3X-4＜0
    xx≤0
    -xx≥0
    xx≥0
    -xx＞0
    -x^2＞1
    2x＞3
    3x-7≥x-8
    1/3x-2≤1/4x+1
    x-7≥3x+2
    1-0.5x≤3
    (2/3)x+2≤1
    3x<5x-4
    1-(x+1)/3>x-x/2-(x+8)/6
    3(1-x)>1-2x 1-(2x-1)/3>=(5x+1)/-2

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