Currently there appears to be no tags distinguishing between definite vs. indefinite integrals and sums. This is an important distinction that deserves to be made when tagging. Could those who have some experience with the current tag system please offer some advice on the best way to represent this information.
As far as I know, there is no easy way to make this distinction on past questions. You have to go through all of the questions tagged [integrals] (or whatever it is) by hand and sort them, and doing so will bump them. What we can do as a start is to try making this distinction on questions from now on.