input: 
  def calculate_sum_lambda(a: int, b: int) -> int:
      """ 
      Calculate the sum of two variables using lambda 
      
      >>> calculate_sum_lambda(3, 4)
      7
      >>> calculate_sum_lambda(-1, 1)
      0
      """
      return (lambda a, b: a + b)(a, b)
  
output:     return (lambda a, b: a + b)(a, b)