input: 
  def filter_list_greater_than_50(numbers: list[int]) -> list[int]:
      """
      Filters a list of integers to keep only those greater than 50 using a lambda expression.
      >>> filter_list_greater_than_50([45, 12, 52, 89, 33, 99])
      [52, 89, 99]
      """
  
output:     return list(filter(lambda x: x > 50, numbers))