Saving expressions?

[Dands]

Hi,

I have the following matrix in my CAS view and would like to save it for later use. The matrix has variables that I pre-assigned with values. What is the best way to save expressions in terms of variables as shown?

I tried to save it as a list but the saved entry does NOT carry variable names, just values.

Other questions I have:

- Why is it not possible to have upper case variable names in CAS? ex.: "Z"
- Is it possible to define variables using my computer and transfer them to my calculator?



Thanks