Problem:
Differentiate the following function:
$e^{6 x+1} \cos (3 x+7)$
Answer:
$3 e^{6 x+1} (2 \cos (3 x+7)-\sin (3 x+7))$
{'source': 'AMPS', 'file': 'amps/mathematica/calculus/derivatives/25693.txt'}