Problem:
Find the first order expansion about $x = 0$ of the composition $f(g(x))$ for $f(x) = \tan (x)$ and $g(x) = $\tan ^{-1}(x)$
Answer:
$0$
{'source': 'AMPS', 'file': 'amps/mathematica/calculus/series_compose/26904.txt'}