Mathematics
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    -2≤4/a≤-1
    18x-(8-x)*12=114
    114-18x=(8-x)*12
    m^2+2m+2-8m>0
    4m^2-4(m-1)(2m+1)>0
    -4m^2-m<1/16
    2(1/2m+1/8)^2-m-9/2m^2<1/16
    k^2-6k+1>0
    4-2k+2+k>0
    1-a^2+1+a-2<0 -2
    
1-a^2+1+a-2<0
    1-a^2+1+a-2
    1+a^2-1+a-2<0
    a^4-2a^2-4a+8>0
    ax+1>0
    2-i/1+2i
    1/(x+4)+1/(x+5)>1/(x+6)+1/(x+3)
    2x^(2)+(x-2)×(4x-4)>0
    2x^(2)+(x-2)×(4x-4)
    1 ≤ 409.6*(2000/(2000+x))*((x-110)/(110+2000))

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