input: Write a python function to perform union, intersection, and difference operations on two sets.
  assert set_operations({1, 2, 3}, {2, 3, 4})==({'1', '2', '3', '4'}, {'2', '3'}, {'1'})
  assert set_operations({1, 5, 7}, {2, 4, 5})==({'1', '2', '4', '5', '7'}, {'5'}, {'1', '7'})
  assert set_operations({8, 9}, {9, 10})==({'8', '9', '10'}, {'9'}, {'8'})
output: def set_operations(set1, set2):
      union_set = set1.union(set2)
      intersection_set = set1.intersection(set2)
      difference_set = set1.difference(set2)
      
      return (union_set, intersection_set, difference_set)