-10x^2-512x-128>=0
    -10x^2-512x-128>=0
    225x^2-675x+146.25<0
    75x^2-22500x-750000-195x+15000>0
    (1+0.005x)*(500-x)*1.5>750
    1.5(1+0.005x)(500-x)>=750
    (25+y)(8-0.2y)≥200
    x * (0.01) - x * (1+0.01) * 0.005 > 0
    x^2+1<1
    x^2+1>1
    2-3x2<-5x
    x^2-x-6+1小于0
    x^2-x-2>=0
    x/(x-3)>0
    x/x-3>0
    8.223*1.127^x>11.072*1.062^x
    7x^2+2x-5≤0
    x^2+3x-4≤0
    2x^2+3≥0
    8x^2-28x+12大于0

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