How to apply a list of regex replaces to multiple files?

[michael.l]

I've browsed the messages here and have googled but don't see a clear
solution yet. I have about 900 documents to which I need to apply a
list of maybe 40 separate regex search and replaces. I would like to
feed a list of the regex expressions and replacements to emacs and
have it applied to a directory of the files. Any solutions? Keyboard
macros don't seem like the right solution....