# Efficient algorithms for simplification

Hi!
I come back on an issue on Sage/Maxima, about simplification.
I have some large rational polynomial expressions in -say- ten variables that I would like to simplify.
`simplify()`

does not work properly: the expression still remains too long. `simplify_rational()`

and `simplify_full()`

are even worse, and too slow.
My question is whether, at least for simplifying rational polynomial expression, you know any algorithm or trick that can be used.
Thanks in advance!