\d+a Unicode decimal digit, repeated at least once
"the literal " (3410 / 428 / 2216)
\s+a Unicode whitespace character, repeated at least once
.*?any Unicode character (except for line terminators), repeated any number of times
\s?optionally matches a Unicode whitespace character
Non-Capturing Group(?:\d+\w+|\w+&|$) \d+a Unicode decimal digit, repeated at least once
\w+a Unicode word character, repeated at least once
\w+a Unicode word character, repeated at least once
&the literal & (3810 / 468 / 2616)
g modifier: global. Finds all matches instead of stopping after the first
m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string