a+1>2
    3a-1>5-2a
    x<=x-2/3+2
    3a-5<1-2a
    -x+7>=2x-2
    x-2<3x-2
    （0.4x-1)/0.5-(5-x)/2≤（0.03-0.02x）/0.1
    -4337.9967478-3.497*n+967.3884*n*n/6+30.4512*n*n*n/6>0
    (2x-1)/3-(6x-7)/4≥(2x+5)/12-1
    (x+1)/2-(2x-1)>2
    2(3+x)>=10
    2/3*x+2>0
    5/12-(x-1)/3<=x/6
    (3x+5)/4>(-11x-49)/16
    a-1＞0
    4/3x-（4x-5）/2≥-1
    (0.4x-1)/0.5-(5-x)/2<=(0.03-0.02x)/0.03
    (x+1)/5-(2x-4)/2<=x/2
    5x＋5＜2x－4
    (2x-1)/3-(5x+1)/2>1

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