unsigned nops() const;
ex op(int i) const;
ex & let_op(int i);
- ex expand(unsigned options=0) const;
ex eval(int level=0) const;
- ex evalf(int level=0) const;
ex evalm(void) const {return *this;}
ex subs(const lst & ls, const lst & lr, bool no_pattern = false) const;
ex eval_indexed(const basic & i) const;