Mathematics
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    -2x<0
    5-2x≥-3
    5y+20(2y+8)≤1060
    16m ∧2-12m<0
    16m ∧2-12m<0
    x(8√(1-x)+√(1+x))≤11√(1+x)-16√(1-x)
    x(sinx+1)>0
    e∧x≥ex
    -5*x+1>0
    (10+x)/(3+x)≧2
    (x+10)/(x+3)≧2
    x+10÷x+3≧2
    -lnx/x^2>0
    lnx/x^2>0
    20x+30(8-x)≥210
    20x+30(8-x)≥210 (90-20)x+(130-30)(8-x)≤770
    78x≥-30 50x≤-30
    2.78x/(x+1400)>0.88
    2.78x/x+1400>0.88
    2cos(x-6/π)-1<0

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