are there any exercises that combine three or more movements like flexion, extension

If you sit is a traditional crossed-legged position the movements involved in those position include:

1. Hip flexion
2. Abduction of the femurs
3. One can add rotation in that position to stretch the rotators of the spine as well as the obliques.
4. By placing the hands on the floor and elevating the sternum one can extend the spine.

I hope this is of help to you.