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replacement x->y except in Exp[x]

• To: mathgroup at smc.vnet.net
• Subject: [mg110821] replacement x->y except in Exp[x]
• From: Sebastian <sebhofer at gmail.com>
• Date: Thu, 8 Jul 2010 03:12:08 -0400 (EDT)

Is it possible to exclude certain patterns from replacements?
For example I want to replace y for x everywhere except in Exp[x].

TIA Sebastian