## Expanding

Expanding is an option for `Calc`, `Contract`, `DiracSimplify`, `DotSimplify`, `SUNSimplify` etc. As option for `Contract` it specifies whether expansion w.r.t. `LorentzIndex` is done _before_ contraction. If set to `False` in `DiracSimplify` or `SUNSimplify`, only a limited set of simplifications (multiplicative linearity etc.) is performed.

### See also

[Overview](Extra/FeynCalc.md), [Calc](Calc.md), [Contract](Contract.md), [DiracSimplify](DiracSimplify.md), [DotSimplify](DotSimplify.md), [SUNSimplify](SUNSimplify.md).

### Examples