I'm creating an extremely difficult regex challenge that combines multiple advanced pattern types into one text sample. The challenge includes emails with special characters (plus signs, subdomains, hyphens), phone numbers in international and US formats (with optional parentheses, hyphens, country codes, and even an extension), dates in three distinct formats using dashes, slashes, and dots, as well as a mirrored ID that requires backreferences to ensure that the prefix and suffix match exactly... (truncated)