ex eval(int level=0) const;
protected:
ex eval_ncmul(const exvector & v) const;
bool match_same_type(const basic & other) const;
unsigned return_type() const;
ex eval(int level=0) const;
protected:
ex eval_ncmul(const exvector & v) const;
bool match_same_type(const basic & other) const;
unsigned return_type() const;