I am trying to use the following expression to locate a pattern of text in my Excel data. The goal is to then remove the text once it is located.
/.([0-9]+[]?x[]
You didn't specify it but I assumed it was using a VBA macro. i don't think you can do regular expression directly in the sheet using formula.
The following link should help you with regular expression and VBA:
http://www.regular-expressions.info/vb.html
Just be sure to add the correct reference "Microsoft VBScript Regular Expressions 5.5"
Hope this help