Need help redirecting a specific URL

I've been trying to .htaccess redirect a specific URL in WordPress with no luck. Here's what I开发者_Python百科'm trying to accomplish:

/feed and /feed/ should redirect to FeedBurner

BUT any feed URL that has /feed/?... should NOT redirect

Everything I've tried redirects EVERYTHING with /feed (including /feed/?) in it to FeedBurner.

Any ideas?

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RewriteRule ^feed/?$ http://path/to/feedburner

Should work. Can you show what you've tried?