For example this regular expression will capture everything inside of curly braces: {[^}]+} so in this string "Hello how {are} you?" the word "are" will be captured.
Similarly, this captures everything in square brackets: [(.*?)]
I don't understand the similarity between the two and can't figure out how to capture text inside other identifiers. For example, what if I wanted to capture everything inside of characters like this: ^{this}^ in which I want everything inside of ^{ }^ or like this #[ ]#.