I do not understand regular expressions yet. But someone might be able to tell me how to build one.
goal: find in all text in "ebook Edit" in Calibre such strings
in order to delete them.
<a id="page_
9" class="calibre2"></a>
In which the number in red could be any numbers from
1 to
500 or even more.
Thanks for your help.

Is there an online tool or Mac software that can help in building regular expressions from examples of what one want to select ? It would be great!