How to use "casually" in a sentence

'This matter is of no interest to me, Javert,' he said casually

He walked around slowly, stopping to look at the ducks on the lake, then casually approached the bench where Mile Lanoire and her father were sitting

"Can you pass me over the bag? Then you can come and sit here next to me," he says as casually as he can.

So Jake begins to move in his direction, casually

So he crosses the road slowly and casually, walks up the stone steps of the church and looks around once more before he pushes open the wooden doors and goes inside.