I'm creating an extraordinarily difficult challenge that combines:
1. Complex nested structures with multiple types of brackets and quotes requiring precise balancing
2. Unicode characters including RTL markers, zero-width spaces, and mathematical symbols
3. Extremely complex email patterns with quoted parts containing special characters
4. Date/time formats with microsecond precision and multiple timezone formats
5. Nested JSON-like structures with escaped quotes and backslashes
6. XML-like tag... (truncated)