I'm creating an extremely difficult challenge that includes multiple advanced regex elements in a single pattern. The text sample contains a mix of formats: complex emails with plus signs and hyphens, phone numbers with optional extension and parenthesis, ISO dates that require correct validation of leap years, structured codes with slashes and mixed separators, and URLs with query strings and anchors. Additionally, one of the target items includes extraneous whitespace that must be trimmed. The... (truncated)