input: Write a function to improve the existing sum_elements function by reducing the code to a single line. The improved function should still correctly compute the sum of all the elements in a given list.
  assert sum_elements([1, 2, 3, 4, 5])==15
  assert sum_elements([10, 20, 30])==60
  assert sum_elements([])==0
  assert sum_elements([0, -1, 1])==0
  assert sum_elements([-1, -2, -3])==-6
output: def sum_elements(lst):
      return sum(lst)