Problem:
Differentiate the following function:
$\log (-3 x) \cot (7 x+4)$
Answer:
$\frac{\cot (7 x+4)}{x}-7 \log (-3 x) \csc ^2(7 x+4)$
{'source': 'AMPS', 'file': 'amps/mathematica/calculus/derivatives/6823.txt'}