------
## 最终结论
```python
def extract_freq(tuples_list):
    normalized_tuples = [tuple(sorted(t)) for t in tuples_list]
    unique_tuples = set(normalized_tuples)
    return len(unique_tuples)

# Test cases
assert extract_freq([(3, 4), (1, 2), (4, 3), (5, 6)]) == 3
assert extract_freq([(4, 15), (2, 3), (5, 4), (6, 7)]) == 4
assert extract_freq([(5, 16), (2, 3), (6, 5), (6, 9)]) == 4
```