I'm proposing a highly challenging regex matching challenge that combines multiple complex pattern types in a single text sample. The sample includes emails with plus tags and hyphenated subdomains requiring careful escaping, phone numbers with country and extension parts, various date formats with different separators (slashes, dots, and hyphens), IPv6 addresses in both raw and bracketed formats, MAC addresses with hyphen separators, and nested parentheses which require handling of nested group... (truncated)