Hi,

I Need an explanation please for this example given in the tutorial :

$ brun ‘(+ 2 5)’ ‘(40 50)’

90

What I understand is the puzzle ( first parenthesis expression ) is used to do operations on the solution ( 2nd parenthesis expression )

So, what is the action of 2 and 5 in the puzzle ?

And why does it return 90 ?

Edit :

I understand another thing that is unquoted integers are variable environment.

So it would be an addition of 2 in the binary tree and 5 ?

But to me there is only 3 elements in the binary tree : 1 would be (40 50) ; 2 would be 40 ; and 3 would be 50 ? …

Help would be appreciated thanks