See, what you posted originally (book view) did not really represent your problem.
Always ALSO Include the code like you did
2 Steps (could do in one... but simpler this way)
I would remove JUST the number and leave the rest
Code:
<span class="calibre_1">\d+</span>\s
Replace: (a single space)
See what this look like in Book (preview) View
Not enough code for the second part: for removing the <br class="calibre1"/>
OK, you could stop and leave the lines ragged (not flowing cleanly) because the next phase is tricky work.
If you see <br class="calibre1"/> <br class="calibre1"/>
this needs to be replaced FIRST as these are simulated Paragraph breaks If in the text part
replace the pairing with the
(you did not show that code ) ></p>\s*<p class="calibre_"><
NOTE: you are ENDING the previous <P and Starting the NEXT <P (AKA Splitting). THERE WILL BE PROBLEMS, Usually around the Headings. you just need to learn how to fix code. (This is not an easy cleanup)
Once the double breaks are done
You want to remove the rest of the
<br class="calibre1"/>\s and replace those with a single space. You should end with a Paragraph that flows