oh i was thinking this was going to clean (as opposed to expand) my urls.
http://instagram.com/user?importantkey=importantvalue&tracke... -> http://instagram.com/user?importantkey=importantvalue
http://instagram.com/user?importantkey=importantvalue&tracke... -> http://instagram.com/user?importantkey=importantvalue
Naturally, the list will always be incomplete. Feel free to contribute!