hi @TeresaLisbon another quick question if you have time: do $\frac{d}{dx} f(g(a))$ and $f'(g(a))$ and the slope of the tangent line they represent look graphically the same? graphically speaking, it looks to me like they both have the slope of $f(x)$ near $f(g(a))$, but of course if we compute them they aren't the same