I'm dealing with a problem with Feynman amplitudes,using feynarts and formcalc.
I attach a part of the result that I have. What I'm trying to do is to isolate the coefficient of Pair[ec,ec] but if I use the coefficient function this doens't work. Moreover, this is just a part of a huge results (more or less 1000 times bigger than this) and I would like mathematica to give me the output divided into parts. Is it possible to do these things?
Thank you all
Attachment: myres.nb, URL: ,