（2y-16）^2-12(32-y^2)≥0
    0.23*0.95+1.0948*x+（1-0.23-x）*0.92<0.987
    3x^(2)-2x-3>0
    3x^(2)-2x+3>0
    abs(x+2)
    1.448*(y-100)-y>0
    326-y>0
    m-0.5<3/4m
    m-0.5<4/3m
    3500(a-1)+1200a<20000
    30+22x<220
    200*a+170*(30-a)≤5250
    250*a+210*(30-a)≤5250
    5/3m-1>0
    3-m>0
    15x+30x≤6300
    0.9m+0.95*(200-m)≥0.93*200
    0.9m+0.8*(200-m)≥0.93*200
    3x－15≤x-8
    4x＋4≤7x＋10

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