(?i)applies the following effective flags to the remainder of the pattern: gmi i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters
\ba Unicode word boundary
CRMthe literal text CRM (case insensitive) ?optionally matches the literal (3210 / 408 / 2016)
NOthe literal text NO (case insensitive) \D+any character that is not a Unicode decimal digit, repeated at least once
\d+a Unicode decimal digit, repeated at least once
\ba Unicode word boundary
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