ex subs(const exmap & m, unsigned options = 0) const;
ex normal(exmap & repl, exmap & rev_lookup, int level = 0) const;
ex expand(unsigned options = 0) const;
ex subs(const exmap & m, unsigned options = 0) const;
ex normal(exmap & repl, exmap & rev_lookup, int level = 0) const;
ex expand(unsigned options = 0) const;