//ex expand_commutative_3(const ex & basis, const numeric & exponent,
// unsigned options) const;
//ex expand_noncommutative(const ex & basis, const numeric & exponent, unsigned options) const;
//ex expand_commutative_3(const ex & basis, const numeric & exponent,
// unsigned options) const;
//ex expand_noncommutative(const ex & basis, const numeric & exponent, unsigned options) const;