I'm creating an extremely challenging regex scenario by combining a variety of pattern types: advanced email (with subdomains, + signs, and hyphenated domains), an IPv6 literal within square brackets, phone numbers with variable whitespace and extension formatting, dates in a non-standard format that require precise matching, and complex URLs including ports, paths, queries, and fragments. Additionally, I include several misleading entries to force the regex to differentiate between valid matche... (truncated)