Question: 
Write a function to substract the elements of the given nested tuples.


Model's Code:
def substract_elements(t1, t2):
    return tuple(tuple(a - b for a, b in zip(n1, n2)) for n1, n2 in zip(t1, t2))



Sample Correct Code:
def substract_elements(test_tup1, test_tup2):
  res = tuple(tuple(a - b for a, b in zip(tup1, tup2))
   for tup1, tup2 in zip(test_tup1, test_tup2))
  return (res) 


Asserts:
assert substract_elements(((1, 3), (4, 5), (2, 9), (1, 10)), ((6, 7), (3, 9), (1, 1), (7, 3))) == ((-5, -4), (1, -4), (1, 8), (-6, 7))
assert substract_elements(((13, 4), (14, 6), (13, 10), (12, 11)), ((19, 8), (14, 10), (12, 2), (18, 4))) == ((-6, -4), (0, -4), (1, 8), (-6, 7))
assert substract_elements(((19, 5), (18, 7), (19, 11), (17, 12)), ((12, 9), (17, 11), (13, 3), (19, 5))) == ((7, -4), (1, -4), (6, 8), (-2, 7))


Tests:
Test 1 of 3: PASS
Test 2 of 3: PASS
Test 3 of 3: PASS

Test 888 of 974: 683/888 (76.91441441441441%): success