Mathematics
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    3x+6>9
    2x>1
    -2x+3>-3x+1
    3x>2x+1
    x+3≥4
     1/(1+(200*3.1415926)^2)^(1/2) >0.95
    1/(1+(200pi)^2)^(1/2)>0.95
    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

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