Using regular expressions in a report filter

Summary

Using regular expressions in a report filter

Content

Good Day!

I'm attempting to use regular expressions (regex) in a report filter to isolate any entries into a field that are non-numerical.  I've look through the documentation and it seems that Oracle Service Cloud reports can make use of Regex based on the document below, but I have not been successful.  I've used a number of different filter options such as "like, equals, complex expression, etc" and also attempted both "constant and expression" options in the filter.  I attached an example of what I'm looking to do.   Hopefully I'm missing something that someone can point out.  Thank you for looking!!