I'm creating an extremely difficult challenge requiring complex regex techniques by combining multiple pattern types with tricky edge cases. This challenge includes:
1. ISBN numbers in different formats (with/without hyphens, different prefixes)
2. IP addresses with specific range restrictions
3. Credit card numbers with different formats and valid checksums
4. Time expressions with AM/PM and timezone variations
5. Hex color codes with specific brightness conditions
6. Valid JSON keys with escap... (truncated)