^start of line
(?i)applies the following effective flags to the remainder of the pattern: gmi i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters
.+?any character (except for line terminators), repeated at least once
the literal (3210 / 408 / 2016)
.any character (except for line terminators)
Rthe literal text R (case insensitive) \da digit
3 Hellthe literal text 3 Hell (case insensitive) *matches any number of characters from the set below:
\sany whitespace character
-the literal - (4510 / 558 / 2D16)
the literal (3210 / 408 / 2016)
.+?any character (except for line terminators), repeated at least once
,the literal , (4410 / 548 / 2C16)
vthe literal v (11810 / 1668 / 7616) (case insensitive)
the literal (3210 / 408 / 2016)
.+?any character (except for line terminators), repeated at least once
,the literal , (4410 / 548 / 2C16)
vthe literal v (11810 / 1668 / 7616) (case insensitive)
the literal (3210 / 408 / 2016)
.+?any character (except for line terminators), repeated at least once
$end of line
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