ex coeff(const symbol & s, int n=1) const;
ex eval(int level=0) const;
ex evalf(int level=0) const;
- ex series(const symbol & s, const ex & point, int order) const;
+ ex series(const relational & s, int order) const;
ex subs(const lst & ls, const lst & lr) const;
ex normal(lst &sym_lst, lst &repl_lst, int level=0) const;
+ ex to_rational(lst &repl_lst) const;
ex simplify_ncmul(const exvector & v) const;
protected:
ex derivative(const symbol & s) const;