As I wrote in the Markdown file, there's also a usable package for Haskell called `ad` on Hackage. It has both forward and backward autodiff and prevents expres

As I wrote in the Markdown file, there's also a usable package for Haskell called `ad` on Hackage. It has both forward and backward autodiff and prevents expression swell, among other things. This gist is just for illustration purposes.