2*x-1/2*x^2-3/2>0
    x＞e10
    4＜log(3,x)＜16
    2＜xx+3x-4＜3＜lgx＜4
    1＜x＜2
    xxx-6xx+11x-6＞0
    480 ≤ 600-4X≤ 520 1200+（8-12X）
    480 ≤ 600-4X≤ 520
    480 ≤ 600-4X
    (8/9)b^2+4-8b<0
    (2/9)b^2+1-2b>0
    -sqrt(1+((x^(2))/(4)))+((x)/(2))>=-2x
    b/2+√(4-2b-2b^2)>1
    b/2+√(1-2b+b^2)>1
    3n＾2-13n-1900≥0
    4（e+1)>3(e-1)e^2
    -2x>2
    3-x＞0
    2x+4＞6
    103/110x＋975/22≥113

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