Calc[exp] performs several basic simplifications. Calc[exp] is the same as DotSimplify[DiracSimplify[Contract[DiracSimplify[Explicit[ SUNSimplify[Trick[exp], Explicit->False] ]]]]]
See also: DiracSimplify, DiracTrick, Trick.
This calculates in 4 dimensions and in D dimensions.
This simplifies
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