Better way to organize function and programs?

[Rich]

I probably shouldn't keep this thread going because my intentions were a quick fix and not to confuse to anyone. If you are having trouble then maybe another method is better for you until someone develops an actual program with an input, variable storage, and correct purge system.

An example to have a CAS program to purge all your equations can be seen in this attachment.
       

Just list all your variables that you want to purged in the {} as shown... run that to delete everything.