Brackets not working

[kevin-cfs]

I have updated the code to work in Python 3 and it seems to be working alright. But I am having an issue with finding the right information to input into the program.

I found your presentation which helped by providing your theorems and showing the various formats that it works with. https://www.youtube.com/watch?v=FCiA6e44aOI

If you could include a comment section in the code that explains the format of the input and what it all means that would be amazing.

[kevin-cfs]

Okay, here's a real bug. I found your line that says, "The answer I'm looking for lies below. I need to find how to not add redundant things back into the expression." and it is true. There really is an issue with duplicate things being added back into the expression. I am finding that to be an issue. While debugging I noticed the expression growing and growing because duplicates keep appearing. I will report back if I find anything that may help.