Negative indexing in Python allows you to access elements from the end of a sequence, such as a tuple, by counting backwards from the last element. Here are five examples demonstrating how to access elements of a tuple using negative indexing:

1. Accessing the last element of a tuple:

my_tuple = (10, 20, 30, 40, 50)
last_element = my_tuple[-1]
print(last_element)  # Output: 50

2. Accessing the second-to-last element of a tuple:

my_tuple = (10, 20, 30, 40, 50)
second_last_element = my_tuple[-2]
print(second_last_element)  # Output: 40

3. Accessing elements from the end of a tuple with a negative step:

my_tuple = (10, 20, 30, 40, 50)
second_to_third_elements = my_tuple[-2:-4:-1]
print(second_to_third_elements)  # Output: (40, 30)

4. Accessing elements from the end of a tuple using negative indexing within a loop:

my_tuple = (10, 20, 30, 40, 50)
for i in range(-1, -len(my_tuple) - 1, -1):
    print(my_tuple[i])
# Output:
# 50
# 40
# 30
# 20
# 10

5. Accessing elements with negative indexing when the tuple contains nested tuples:

nested_tuple = ((1, 2), (3, 4), (5, 6))
last_element = nested_tuple[-1][-1]
print(last_element)  # Output: 6

These examples demonstrate how you can use negative indexing to access elements of a tuple in Python.