Whenever commands are used in math mode that alter the default line height, \leftX..\rightX must be used instead of regular brackets to make sure the brackets have the right height.

This inspection checks the following commands: \frac, \dfrac, \sqrt, \sum, \int, \iint, \iiint, \iiiint, \prod, \bigcup, \bigcap, \bigsqcup, \bigsqcap

You can also add your own commands in the text area down below. Just put every command (with leading \) on a separate line.