(x+1)/3
    (2-x)/2>(2x-4)/3
    (lnx)/0.09+1/x>13.0343
    n^2-31n>0
    1.1×2240.55×10^6≤13.8×2200×x(1528-x/2)
    1.1×2240.55≤13.8×2200×x(1528-x/2)
    x/2+1>0
    1-(x+5)/2<-x
    x^12+3x^10+5x^8+3x^6-2x^4-1<0
    −20≤−2−6g≤58
    −2y−3≤−5
    −(7+c)<33+4c
    2e-3≤5e+12
    d^2+21>10d
    8p≥−15−p^2
    −4e+7>47 5e−1>24
    4z+18+3z<5+2z+8
    1>−2e−5
    2e+5+1>0
    3<=-r/2

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