Excluded files does not work

Hello everybody, I’m new to obsidian.

I use the feature Options -> Files & Links -> Excluded Files to ignore some file type, like .doc.
but with some regex like below , doesn’t work as expected.

How does it not work? And what do you exist out of the various regex’s? Some of them do look like a little gibberish, sorry to say so.

some are just test. removed them.

want to hide doc files in left nav. Now like this ,the doc files show in the nav.
hope to exclude some file’s type in the left nav panel.

Have a look here: Show / hide file types to be shown in file explorer