Wolfram alpha is useless

Calculus Level 5

\[\large\displaystyle\int \limits^{6}_{5}\frac{\ln\left( 11x+ 12\right) }{x^{2}+ 42} \, dx = \frac {\ln (A)}{B \sqrt{C}} \times \tan^{-1}\bigg( \frac {\sqrt{C}}{D} \bigg) \]

Suppose the equation above is true for constants \(A,B,C\) and \(D\), what is the value of \(A+B+C+D\)?

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