input: Write a python function to compute the square of each element in a list.
  assert compute_squares([1, 2, 3, 4, 5]) == [1, 4, 9, 16, 25]
  assert compute_squares([10, 20, 30]) == [100, 400, 900]
  assert compute_squares([2, 4, 6, 8, 10]) == [4, 16, 36, 64, 100]
output: def compute_squares(lst):
      return [x**2 for x in lst]