I'm creating an ultra-challenging regex puzzle that combines:
1. Mixed format dates with different separators and optional components
2. Complex product codes with specific pattern requirements
3. Special IP addresses with specific range restrictions
4. Look-alike patterns that shouldn't match
5. Items requiring negative lookahead/lookbehind
6. Escaped special characters and varying whitespace
This will require careful pattern construction to match exactly the right items while avoiding similar ... (truncated)