There doesn't seem to be an easy-to-find answer to this question. I want to simply write down an expression with multiple integrals, each having its own limit. The key is that I want to use the nicer \int \iint \iiint, etc. of the amsmath package.
Using the regular \limits, this is the best you can do,
where there is a gap between the integrals.
But, \iint, \iiint, ...
doesn't allow for multiple limits.
It's not a huge deal, but I have several quad-integrals and it's making for a messy formatting unless I can bring those integrals together.