163020/x-163020/（x+10）<3
    779999/x-77999/(x+10)<5
    50≤31.3+C-C×6%/4≤60
    31.3+c-c×6%/4≤60
    24x-6*sqrt(36-12x)-36<0
    6*sqrt(36-12x)+48x-108>0
    12x-12*sqrt(36-12x)-108+18*sqrt(36-12x)+36x>0
    10x-1>7x
    0.06*42000>0.48y
    15+3（x-5）×80％≤27
    15-3（x-5）×80％≤27
    49x^4-1376x^2+256≤0
    x^2-8x+8>0
    5-3x<20
    180(3/2a+5)+480a≤21300
    41^2×x^2-（x^2+1）(49x^2+256)≤0
    -900+x-x*0.02≥1000
    (1-x^2)^2+(0.45x)^2-0.81<0
    x^4-1.1x^2+0.19<0
    4x+4<7x+13 3x-24>3x-12

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