Pattern Matching Question

*To*: mathgroup at smc.vnet.net*Subject*: [mg116702] Pattern Matching Question*From*: Just A Stranger <forpeopleidontknow at gmail.com>*Date*: Thu, 24 Feb 2011 06:23:57 -0500 (EST)

I'm new to pattern matching, and am stuck on a seemingly simple probem: If I want to transform a pattern like (I) Power[x,_] i.e. x^_ but NOT (II) Power[x,Plus[_,_]] i.e. x^(_+_) How would I go about making that rule? x^_ -> NewForm Applies the rule to (II), which I don't want. Thank you for your help :)