input: from typing import Tuple
  
  def sum_with_lambda(a: int, b: int) -> int:
      """ Calculate the sum of two variables using a lambda function.
      >>> sum_with_lambda(3, 4)
      7
      >>> sum_with_lambda(5, 5)
      10
      """
      return (lambda x, y: x + y)(a, b)
output:     return (lambda x, y: x + y)(a, b)