I'm proposing a challenge that combines multiple advanced formats and complex elements. The text sample includes several types such as emails with IP-literal domains and special characters, international phone numbers with optional extension parts in multiple formats, dates in ISO-8601 with time and Z, slash-separated, and dot-separated variations, as well as ID patterns, IPv4, IPv6, and MAC addresses. This challenge forces regex experts to handle advanced escaping, alternations, optional groups... (truncated)