How to remove text between characters in notepad++?

Question

Regular Expressions

Two questions.
1.there is text
aaaaaa, bbb, vvv
yy, ddd, eee,
etc.
It is necessary to regularly delete everything up to the first comma (aaaaaa, and yy, )
2.
text-
aaa, bbb, yyy.
you need to remove everything between the second comma and the period (, yy. )

Answer 1

I don't use notepad++, but speaking specifically about regular expressions, like this:
1)
2)
s/(.*,)[^.]*(\.)$/\1\2/