No, you can’t call flows from a formula. What is being requested here is the ability to define functions to call later. It could look something like:
- Declare global function with name
sqr
and one argument calledn
function body being$#n * #n$
- Use that function in some other formula:
$gf(sqr, 4)$
Basically, you’d have a reusable block of code that could be as complex as you want that transforms some arguments into a result value.