-2x≥0
    4x-3≤1
    （1/2）x>（1/3）x
    2x>1
    2x^(2)-3x^(3)+12≥0
    1/x大于1
    6k-3k^2+1>=0
    （X-2293.5）/X*100%=0.025
    x/2-x-1/3>0
    3(x+1)<2x+3
    8x(x+9)=112
    5/x+13
    2/y+1
    5/y-3
    2+5/y-3
    y-y-1/2>2+y-3
    y-2/y-1>2
    y-2/y-1
    y-2/y-1>2+5/y-3
    100+X/280-40-x/280≥0.6

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