Complex sentence: Regular expressions are so useful in computing that they should like to become a common standard for everyone, so the various systems of regular expressions have evolved to provide a "basic" and "extended" standard for the grammar and syntax.
Split into simpler sentences: Regular expressions are so useful in computing that they should like to become a common standard for everyone. The various systems of regular expressions have evolved to provide a "basic" and "extended" standard for the grammar and syntax.