Mathematics
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    3x-8<4(1-x)
    3x-8<4(1-x)
    abs(sinx)≤abs(x)
    x-3<8-x
    
x-2<8-x
    
10/(x+1)^3>0
    10x∧3+33x∧2+20x-4.5≦0
    10x+5(20-x)≥95
    ln(x+1)小于sinx
    ln(x+1)大于sinx
    1/x>=-3
    x(3x+1)>=0
    -100(x-2)^2+14400<10800
    800x+8000<10800
    8X-X^2/4大于等于42
    20-10k-k^2>0
    a²+4/a²≥4
    x^2-x-12<0
    a^1/2>-3/2
    X²-X-6>0

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