input: 
  def calculate_sum_with_lambda(a: int, b: int) -> int:
      """ Suggest a valid Python syntax to calculate the sum of two variables using lambda
      >>> calculate_sum_with_lambda(3, 4)
      >>> sum = lambda a, b : a + b
      >>> print(sum(3,4))
      """
  
output:     return (lambda x, y: x + y)(a, b)