Create a function that returns the original value from a matrix with too many sub-arrays.
deNest([[[[[[[[[[[[3]]]]]]]]]]]]) ➞ 3
deNest([[[[[[[true]]]]]]]) ➞ true
deNest([[[[[[[[[[[[[[[[["innokodakademija"]]]]]]]]]]]]]]]]]) ➞ "innokodakademija"
You only need to retrieve one element.