input: Write a function that calculates the sum of two variables using a lambda function. The function should take two arguments and return the sum of these two arguments using a lambda function.
  
  assert calculate_sum_lambda(3, 4) == 7
  assert calculate_sum_lambda(5, 7) == 12
  assert calculate_sum_lambda(-1, 1) == 0
  assert calculate_sum_lambda(0, 0) == 0
  assert calculate_sum_lambda(10, -3) == 7
output: calculate_sum_lambda = lambda x, y: x + y