2243+33-5(x-10)/4>5
    x^2-3.8＜0
    3.5x-2<=2x+1
    2x+1<3.5x-1
    x - 5 < （x - 12 ）/ 3
    x - 5 < x - 12 / 3
    x-5
    2x-2＞x
    3.816<11*6.93/x<21.92
    -1.96<(1000.25-x)/(sqrt(8)/sqrt(12))<1.96
    -2.2<(1000.25-x)/(2.63/sqrt(12))<2.2
    -1.96<(1000.25-x)/(2.63/sqrt(12))<1.96
    8x-1-9+3x<8x-3
    11x-10<8x-3
    4(2x-1/4)-5(9/5-3x)<8(x-3/8)
    4(2x-0.25)-5(1.8-3x)<8(x-0.375)
    11x-8<8x-3
    4（2x-1/4)-5(9/5-3x)<8(x-3/5)
    4*(a - 2)*(a + 1) - 1 > 0
    4*(a + 2)*(a + 1) - 1 > 0

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