The cse create some expressions that are just aliases of existing symbols. How can I prevent that?
e.g. (x5, x1), (x7, -x5) -- You received this message because you are subscribed to the Google Groups "sympy" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/sympy. To view this discussion on the web visit https://groups.google.com/d/msgid/sympy/e85e2684-10ff-4e05-be40-651570b24d85%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
