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Re: Finding an exponent?

• To: mathgroup at smc.vnet.net
• Subject: [mg112379] Re: Finding an exponent?
• From: Sseziwa Mukasa <mukasa at jeol.com>
• Date: Sat, 11 Sep 2010 05:46:01 -0400 (EDT)

On Sep 10, 2010, at 4:50 AM, AES wrote:

> Given  Exp[ expr ]  where   expr  is some complex expression in Standard
> form, how can I get  expr  itself in an Input cell?   (Preferably
> unevaluated, and other than using manual Copy and Paste).
>
> Log[Exp[expr]] doesn't seem to do it.
>

The short answer is you cannot, the argument to Exp will be evaluated.  However you can get the evaluated argument by

Rest[Exp[expr]]

or

Exp[expr][[2]]