How to restore deleted songs from iTunes Match?

I thought I was deleting a couple of things from iTunes Match, but somehow deleted a bunch of others. I know, I know, silly me. Anyway, I still have most of the items I deleted on another Mac, but they're shown with a cloud symbol with an X in it. I'd like to get those things stupidly deleted back on iTunes Match, instead of only on one Mac...that is, also on my iPhone and iPad. I appreciate any advice.