I don't know how to start solving my exercise

Question

The exercise request is
When I enter this phrase:fn2(x,5,g(j5,"yes"))
the output mast be
fn2:fonction
x:variable
5:costant
g:function
j5:varible
"yes"canstant

I don't know how to start the exercise. I thought, but I did not find the solution, and this is the code that I wrote
https://code.sololearn.com/cMzAKH3bAMxZ

Answer 1

mar ia Here is one possible solution:
https://code.sololearn.com/cyhXuXWslvTn/?ref=app

Answer 2

mar ia Nice exercise! I will try to solve it.

Answer 3

Thank you so much🥰