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Re: Extract a part of expression

• To: mathgroup at smc.vnet.net
• Subject: [mg124334] Re: Extract a part of expression
• From: DrMajorBob <btreat1 at austin.rr.com>
• Date: Tue, 17 Jan 2012 03:24:51 -0500 (EST)
• Delivered-to: l-mathgroup@mail-archive0.wolfram.com
• References: <201201162207.RAA15301@smc.vnet.net>
• Reply-to: drmajorbob at yahoo.com

Try a legal expression. That one isn't.

Bobby

On Mon, 16 Jan 2012 16:07:20 -0600, Miguel Gil <misvrne at gmail.com> wrote:

> How I can extract the full numerator (or denominator) of an expression  
> of the form g (x) / w (x)?.
> I tried to do with Numerator [expr], but returns a wrong result. I tried  
> with the attribute HoldForm [expr] and can not get the correct result.
>
> For example:
>   expr = (x ^ 2 Cos [x] (Sin [2x], Tan [x ]))/( E ^ x * x * Csc [x] ^ 2)
>


-- 
DrMajorBob at yahoo.com

• References:
  • Extract a part of expression
    • From: Miguel Gil <misvrne@gmail.com>