Let N,O be functions such that N(x) = 2sqrt{x}, and O(x) = x^2. What is N(O(N(O(N(O(3))))))?
N(O(N(O(N(O(3))))))
O(3) = 9
N(O(3)) = N(9) = 6
O(6) = 36
N(O(6)) = N(36) = 12
O (12) = 144
N(O(12))) = N(144) = 36
