Negative Lookbehind(?<!\d) -?optionally matches the literal - (4510 / 558 / 2D16)
\d*a digit, repeated any number of times
?matches at most one character from the set below:
.the literal . (4610 / 568 / 2E16)
,the literal , (4410 / 548 / 2C16)
\d+a digit, repeated at least once
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