(?x)applies the following effective flags to the remainder of the pattern: gx x modifier: extended. Ignores unescaped whitespace and comments outside character classes
\d+a digit, repeated at least once
Comment: at least one digit
\.the literal . (4610 / 568 / 2E16)
Comment: a period
\sany whitespace character
Comment: a space
Negated Character Class[^\d]+ +matches at least one character outside the set below:
\da digit
Comment: not a digit, 1 or more of them
\s+any whitespace character, repeated at least once
Comment: a space, 1 or more of them
g modifier: global. Finds all matches instead of stopping after the first