input: 
  def calculate_sum(a: int, b: int) -> int:
      """Return the sum of two given integers using lambda.
      >>> calculate_sum(3, 4)
      7
      >>> calculate_sum(10, 20)
      30
      """
      sum_lambda = lambda x, y: x + y
      return sum_lambda(a, b)
  
output:     sum_lambda = lambda x, y: x + y
      return sum_lambda(a, b)