How can I add or exclude specific phrase/text for each rule?

Hi, I want to do 2 things for each rule I have.

1- I wanna add a text in the end of each rss to post rule, for each rule.

For example… “Originally taken from (font name)

2- I also wanna exclude specific text from each rss to post rule…for example… this always comes together to rhe post and I need to exclude it mannually.
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