Problem:
Find the second derivative of the following function:
$\tan ^{-1}(\log (7 x+2))$
Answer:
$-\frac{49 (\log (7 x+2)+1)^2}{(7 x+2)^2 \left(\log ^2(7 x+2)+1\right)^2}$
{'source': 'AMPS', 'file': 'amps/mathematica/calculus/second_derivatives/24510.txt'}