Hi All, I don't use C-b, C-f, C-p, C-n for cursor movements. I want to use them for expression evaluations. Did anyone try that. Does it break anything else?

You can invoke describe-key and hit those key combinations. It will tell you what commands are currently bound to those key combinations (if any). Then you can decide if you need those bindings or not.

Since you already mentioned you don't use those, go ahead.