REGEXEXTRACT with capturing group
问题 I wonder if there is a way to refer to the group captured in same expression when using REGEXEXTRACT() in Google Sheets? Let's say we have a sample string: aaa123bbb123ccc456ddd123eee123fff456ggg and we'd like to extract the part where some 3 digits occure at least 3 times. Normally I would use regex like this: (\d{3})(?:[^\1]*\1){2,} but how to refer to the first group in =REGEXEXTRACT(A1;"(\d{3})(?:[^\1]*\1){2,}") ? This one returns error in Sheets. 回答1: There is no backreference support in