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I want to calculate traces of Dirac matrices with a program like Mathematica.

I found the package FeynCalc but it seems to be outdated.

It is always producing results like this:Which is quite annoying. Even worse I want to use the metric (-1,1,1,1) and there seems to be no support for changing the metric.Code (Text):

4 (-(DiracCanonical->False) (Factoring->False) (FeynCalcInternal->True) g^(mu nu)

(InsideDiracTrace->True) k\[CenterDot]l-l^2 (DiracCanonical->False) (Factoring->False)

(FeynCalcInternal->True) g^(mu nu) (InsideDiracTrace->True)+m^2

(DiracCanonical->False) (Factoring->False) (FeynCalcInternal->True) g^(mu nu)

(InsideDiracTrace->True)+k^nu l^mu (DiracCanonical->False) (Factoring->False)

(FeynCalcInternal->True) (InsideDiracTrace->True)+k^mu l^nu (DiracCanonical->False)

(Factoring->False) (FeynCalcInternal->True) (InsideDiracTrace->True)+2 l^mu l^nu

(DiracCanonical->False) (Factoring->False) (FeynCalcInternal->True)

(InsideDiracTrace->True))

Is there a better program/package for doing those calculations?

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# Program for Traces of Dirac matrices

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