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Hi David,

On Fri, 2021-05-21 at 17:19 +0100, David Lynch wrote:
If I use the REGEX tester <>
with regular expression (?=(29|79|97))
and test string 29791
I get 3 matches 29, 97,79, as I expect.
On the other hand, if I enter =REGEX("29791","(?=(29|79|97))",,1)

I think you have to escape the parentheses vis:


that yields 79

Tony Arnold MBCS, CITP | Senior IT Security Analyst | Directorate of IT Services | Office 1, 
Kilburn Building | The University of Manchester | Manchester M13 9PL | T: +44 161 275 6093 | M: +44 
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