I really need some help please! I'm trying to write an expression to use in a WordPress plugin to redirect some urls.

Original Type of URL: http://www.homeconstructionimprovement.com/2007/01/engineer-architect-builder-wing-it.html/feed

Needs To Look Like This: http://www.homeconstructionimprovement.com/engineer-architect-builder-wing-it/feed

Notice the year and month are removed and the dot.html is also removed.

Can anyone help me?