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MathGroup Archive 2011

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how do you prevent numerator expansion when using 'Together'?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg122249] how do you prevent numerator expansion when using 'Together'?
  • From: Dushan Mitrovich <dushanm at nnips.net>
  • Date: Sat, 22 Oct 2011 06:07:37 -0400 (EDT)
  • Delivered-to: l-mathgroup@mail-archive0.wolfram.com

I'm using Mathematica 8.  When using 'Together' on an expression the numerator 
is always expanded, complicating the appearance of the final result:

     In:  Together[ (a+b)/d + ((a+b)*(e+f))/(d*g) ]
     Out: 1/(d*g) * (a*g + b*g + a*e + b*e + a*f + b*f)

Instead, I'd much prefer the simpler form
          1/(d*g) * (a+b)*(g+e+f)

What do I need to do to get the latter form?  Thanks.

- Dushan
   [ reverse the middle word of address to reply ]



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