Delete String over multiple Columns [Regex Syntax needed]

Hello there,

im not to deep into regex to get this thing working right.

So in my case im exporting article data writen in HTML. I splitted cells based on but now the closing parent of this expression is still visible as “”. And also I have the " " for linebreaks.

I tried on https://regexr.com/ to get a expression working but i dont get the point how to get the <> characters in the expression working, as well as the composition of the excakt characters and digits.

As i will do this on multiple columns my version was:

regexReplace($$CURRENTCOLUMN$$,“[p]\w+\d{4}” ,“”)

But as expected this is far off from correct.

If anybody could give a detailed describtion on how the syntax of Regex is working would be very handsome. Because the Tips in KNIME give u an overall understanding but abc ABC is most likely not the usecase for this. All the research just made things worse to understand to be honest.

Thanks alot