input: Write a function to filter a list of integers to include only those greater than 50 using a lambda expression in Python. The function should return the filtered list.
  filtered_list = list(filter(lambda x: x > 50, list1))
  
  assert filtered_list([45, 12, 52, 89, 33, 99])==[52, 89, 99]
  assert filtered_list([10, 20, 30, 40, 50])==[]
  assert filtered_list([51, 52, 53, 54, 55])==[51, 52, 53, 54, 55]
  assert filtered_list([])==[]
  assert filtered_list([100])==[100]
output: def filtered_list(list1):
      return list(filter(lambda x: x > 50, list1))