Mathematics
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    4800×(30-x)+8000x≤176000
    -m/3>2/3
    4800×(30-x)+8000x≤176000
    (1/2/(1-a))*(1/2/(1-a))+1/(4*a)*(2-a)/(1-a)<0
    (-1/2a)*(2-a)/(1-a)>0
    (-1/2a)<1
    2x1 + x2 < 1000
    5500x60+5000x>550000
    0
    
100a+130(30-a)>=2100
    200m+150(30-m)<=5500
    (x-6)^2-9<0
    x^2+x
    
x^2+x
    
-11000
    3<2
    
x>2^31
    lnlnlnlnlnx<10
    x^2>0 x^2>=0
    x^2<0

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