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FullSimplify fails for very large numbers and powers

  • To: mathgroup at smc.vnet.net
  • Subject: [mg89880] FullSimplify fails for very large numbers and powers
  • From: Paul Schneider <a9408266 at unet.univie.ac.at>
  • Date: Tue, 24 Jun 2008 03:19:48 -0400 (EDT)
  • Organization: University of Economics and Business Administration, Vienna, Austria

Dear newsgroup,

FullSimplify (Mathematica 6 and 5.2) does not simplify the expression:

(-1505046085600344525396741688335403635402237542400000000000000000000000000*(-kth 
+ 2*k*r)^187*(kth - 2*k*r + 6*s*(-2*k*rho + s))^6*
   (kth - 2*k*r + 8*s*(-2*k*rho + s))^6*((k^196*(kth + 
s^2))/(3010092171200689050793483376670807270804475084800000000000000000000000000*(-kth 
+ 2*k*r)^187*
      (kth - 2*k*r + 6*s*(-2*k*rho + s))^6*(kth - 2*k*r + 8*s*(-2*k*rho 
+ s))^6) + (k^196*(4*k^2 - 4*k*rho*s + s^2))/
 
(3010092171200689050793483376670807270804475084800000000000000000000000000*(-kth 
+ 2*k*r)^187*(kth - 2*k*r + 6*s*(-2*k*rho + s))^6*
      (kth - 2*k*r + 8*s*(-2*k*rho + s))^6)))/k^199

to the much nicer

-(4*k^2 + kth - 4*k*rho*s + 2*s^2)/(2*k^3)

Do you have tips on how I could achieve this?

Thank you,

Paul

PS: the expressions are in InputForm. Somehow the power signs get lost 
when pasting from Thunderbird. Pasting from Kmail seems to work.


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