^start of string
.*any character (except for line terminators), repeated any number of times
\/the literal / (4710 / 578 / 2F16)
\/the literal / (4710 / 578 / 2F16)
Negated Character Class[^\/]+ +matches at least one character outside the set below:
\/the literal / (4710 / 578 / 2F16)
:?optionally matches the literal : (5810 / 728 / 3A16)
?matches at most one character from the set below:
0-9one character from 0 (4810) to 9 (5710)
\/the literal / (4710 / 578 / 2F16)