Porting Sinan Gabel's DerivativesExpert (Mathematica) to Haskell.
Mathematica code in this repository is (c) Johan Astborg, Andreas Bock, all rights reserved.
This code (including git history!) needs to be deleted before publishing the repository (i.e. either make a new repository or avoid checking it in in the first place).
We can use a BSD-3 license or another open-source license (later).
