2x^2-3x-2>0
    (x/2)-(x/3)>-1 2(x-3)-3(x-2)<0
    4x<6+5x 10-4x>15-9x
    0.5x+3<-2
    x-1<2x
    3x-(x+2)/4≤(2x-5)/6
    (7/4)x+2(x-1)≤0.75x+4
    -2≤(1+2x)/3≤2
    5(x+2)≤28-2x
    2x-7<3(x-1) (4/3)x+3≥1-(2/3)x
    2x-7<3(x-1) (4/3)x+3≥1-(2/3)x
    x+1<1
    X>(8000-X)*63%
    -57177.33+24723/(1+x)+25023/(1+x)^-2+25323/(1+x)^-3<0
    -57177.33+24723/(1+x)+25023/(1+x)^-2+25323/(1+x)^-3<0
    t+1/t≥5/2
    0.87（9－x）+1.13x≥9
    0.6（4－x）+1.4x≥4
    -1≤x^2-2x≤3
    x^2-5x+16＞0

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