6x/x^2+1≤2x-1
    5x-3x-59<4
    3x+59<5(x-1)+3
    －x－3＜1
    2-3(7+2x)<5 (2x-1)/3-(5x+1)/2<=1
    ( 2 / 1 + x ) + ( 3 / 1 - x ) ≥1
    （2/1+x）+（3/1-x）＞1
    -x^3+3x^2+x+1＞0
    5x-(3x+59)<3
    5x-(3x-59)<3
    x-5[(x-59)/3-1]<3
    2x-1/5＞x-1/2
    X-3（x-2)≤8
    (x+3)/5>1-x
    (x+3)/5>2x+3
    5-(2x-1)<-6x
    2x+9>3
    -(x-1)>3
    2x+1>-1
    15-7a<1

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