regex stands for "regular expressions". They are used to define a string search pattern that could be used in some web applications like Google editors to do input validation, search and replace among other similar tasks.

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Is there a way to search in Google using regular expressions (regex)?

It would be very useful if Google provided a regular expression search. Is there a way to do this? (OBS: I am not talking about false regular expressions like site:, filetype:, AND, OR or "Text". I ...