Throughout my participation in this site, the one thing that I have admired and been inspired by most is the high-level integration problems and beautiful and amazing solutions posted by users such as sos440, Chris'sis, Ron Gordon, and so on. Myself I am aspiring to do this sort of integration, and I have used this site extensively to find such problems and solutions.
There is, however, no (advanced-integrals) tag - this is a meta tag and we shouldn't have it. However, I feel that having an organized catalog of the best of these problems would be useful to myself and perhaps others. I'm aware of the elementary calculus exercise catalog, which is supposedly to prevent duplicates, but the reason for this one would be entirely different. Would such a catalog be appropriate for meta?