* Move sum tests into math directory
* Move sum documentation over to math documentation
One sum example already existed in the math examples and a few of the others were outdated and didn't work, so I only moved one over, and updated their output
* Remove no-longer-in-use mod statement
* Adding math docs
* Add some comments to calculate
* Remove redudant message
Message already shows up in subcommands list
* Added not working example
Accidentantly
* Remove table