Suppose A=int (dx)/(x^(2)+6x+25) and B=i...

Suppose `A=int (dx)/(x^(2)+6x+25)` and `B=int(dx)/(x^(2)-6x-27)`.
If `12(A+B)=lambdatan^(-1)((x+3)/(4))+mu ln |(x-9)/(x+3)|+C`, then the value of `(lambda+mu)` is ... .

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Suppose `A=int (dx)/(x^(2)+6x+25)` and `B=int(dx)/(x^(2)-6x-27)`. If `12(A+B)=lambda*tan^(-1)((x+3)/(4))+mu* ln |(x-9)/(x+3)|+C`, then the value of `(lambda+mu)` is ... .