input: Write a function to create a lambda expression in Python that filters a list of integers greater than 50. The function should return the filtered list.
  
  def filter_greater_than_50(list1):
      return list(filter(lambda x: x > 50, list1))
  
  assert filter_greater_than_50([45, 12, 52, 89, 33, 99])==[52, 89, 99]
  assert filter_greater_than_50([10, 20, 30, 40, 50, 60])==[60]
  assert filter_greater_than_50([100, 200, 300, 400])==[100, 200, 300, 400]
  assert filter_greater_than_50([1, 2, 3, 4, 5])==[]
  assert filter_greater_than_50([])==[]
output: def filter_greater_than_50(list1):
      return list(filter(lambda x: x > 50, list1))