50+0.95(x-50)>100+0.9(x-100)
    (x+365*60%)/365>70%
    x+365*60%/365>70%
    (3y+7)/4<-2
    y-1<=2y-3
    4x+7>=6
    2(x+1)>=1
    (n^3+5*n+6)/6>=1024
    (n^3+5*n+6)/6>=17
    （173+x）/（278+x）≥0.85
    abs(x^2-2x-4)<1
    abs(2x-1)>=2+x
    x^2-6x<16
    2x/(x-1)<1
    -10(x^2)-22x+50x+110>150
    -10(x^2)-22x+50x+110>200
    -10(x^2)-22x+50x+110>100
    5.5y+((1-(1/60+1/90)y)/(1/90)*2)<=186
    X2-3X-4＜0
    xx≤0

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