Discuss advanced techniques for working with regular expressions in Perl.

When working with regular expressions in Perl, there are several advanced techniques and features that can greatly expand your capabilities and allow you to handle complex pattern matching tasks. Here are some advanced techniques for working with regular expressions in Perl: 1. Anchors: * Anchors are special characters that match a specific position within a string. * The caret (^) anchor matches the beginning of a line or string. * The dollar ($) anchor matches the end of a line or string. * Anchors are useful for ensuring that a pattern matches only at specific positions within the input. * Example: `/^start/` matches "start" only if it occurs at the beginning of a line or string. 2. Word Boundaries: * The \b metacharacter represents a word boundary. * It matches the position between a word character (\w) and a non-word character (\W). * Word boundaries are helpful for matching whole words rather than partial matches. * Example: `/\bword\b/` matches the word "word" as a whole word, not as part of another word. 3.....