Undocument a bunch of expression methods, cf #1668

[pzinn]

hopefully this reduces the number of undocumented methods, cf #1668

[mahrud]

Ah, sorry I should have been clear that I'm already working on this on a branch, I just wanted to know if you have a particular preference about how to do it.

For instance, do you specifically want things like Sum + Sum to appear in the documentation (perhaps along with the documentation of +), or is it okay if we undocument all default operations on Expressions other than some exceptions? (e.g. denominator Divide, etc.)

[pzinn]

well, you can see my proposed solution, that should answer your question

[mahrud]

It doesn't really answer this question:

For instance, do you specifically want things like Sum + Sum to appear in the documentation (perhaps along with the documentation of +), or is it okay if we undocument all default operations on Expressions other than some exceptions? (e.g. denominator Divide, etc.)

Which nodes involving expressions do you think should be listed in the documentation?