how to display the list of all monomials occurring in a polynomial
let f=x+y+z+xy, how to display the list of all monomials occuring in f2, by hand computing, the list should be [x2y2;x2y;xy2;xyz;x2;xy;y2;xz;yz;z2]
R.<x,y,z>=ZZ[]
f=x+y+z+x*y;f^2