How to return the monomials in a polynomial in Maple? Are there some function $f$ which returns the monomials in a Laurent polynomial? For example, $f(a_1^{-1}+3b_{2,1})=[a_1^{-1}, 3b_{2,1}]$. Thank you very much.

Another user suggested the 'op' command.
That will work provided that your polynomial has two or more terms, but if the polynomial input is itself a monomial, op will return the factors of the monomial term, which you don't want.
You could get around that with
MonomialList := e->`if`(type(e,`+`), convert(e,list), [e]);

Examples:
> MonomialList(x+y*z);
                              [y z, x]

> MonomialList(x*y*z);
                               [x y z]

