If you happen to ignore the secrets of regular expressions and you need to perform these rather common tasks, here is how you can do it.
A most useful search (and replace or remove) command is when you need to get rid of some links.
/<a href="http:\/\/domain\.com[^>]*>([\s\S]*?)<\/a>/
The formula above will find any domain.com link. If you need to remove the link and keep its reference unlinked, just use in the “replace” box the instruction $1
* Search for image tags
/<img([\s\S]*?)>/
* Search for images in a link to select both the image and the link
/<a href=[^>]*><img src="([\s\S]*?)><\/a>/
* Search for images with captions
/\[caption([\s\S]*?)\/caption]/
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