The second one will work provided that you don't have nested parens:

If there's a possibility of that sort of thing happening, you'll probably want to look at Pustular Postulant's recommendation, and not use a regex. (I don't know that exact module, so if it'll handle it, or if you need to look for something else) I've typically run into this problem with SGML, so used a parser specifically for HTML or XML... I don't know if there's something that does nested braces and the like.