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Fwd: How to make Mathematica to return "Log[Exp[x]]" as x?

• To: mathgroup at smc.vnet.net
• Subject: [mg5704] Fwd: [mg5669] How to make Mathematica to return "Log[Exp[x]]" as x?
• From: BobHanlon at aol.com
• Date: Sat, 11 Jan 1997 14:29:04 -0500
• Sender: owner-wri-mathgroup at wolfram.com

Use 

PowerExpand[ Log[ Exp[x] ] ]

or

Log[ Exp[x] ] // PowerExpand
---------------------
Forwarded message:
From:	chengli at uab.edu (Cheng Li)
To: mathgroup at smc.vnet.net
To:	mathgroup at smc.vnet.net

Dear friends, suppose x is a variable and when I type "Log[Exp[x]]" and then 
enter, Mathematica gives me "Log[Exp[x]]" back. Could you please tell me how 
to let Mathematica to return "Log[Exp[x]]" as x?
Thank you very much.
Cheng Li
chengli at uab.edu