Prevent Sage from executing symbolic computation
I would like to ask Sage not to perform a certain symbolic computation until I tell it to. This is because I would like first to show with
view the thing I am typing, and then execute it later. So, for instance, I would like something like
sage: view(noexec(sum(1/k^4, k, 1, oo)))
(which should show the summation formula without executing it) and
sage: view(sum(1/k^4, k, 1, oo))
(which should show the result, as it actually does).
Is this possible?