^start of string
Negative Lookahead(?!code) codethe literal text code (case sensitive) \[the literal [ (9110 / 1338 / 5B16)
bthe literal b (9810 / 1428 / 6216) (case sensitive)
\]the literal ] (9310 / 1358 / 5D16)
.*?any character (except for line terminators), repeated any number of times
\[the literal [ (9110 / 1338 / 5B16)
\/the literal / (4710 / 578 / 2F16)
bthe literal b (9810 / 1428 / 6216) (case sensitive)
\]the literal ] (9310 / 1358 / 5D16)
Negative Lookbehind(?<!code) codethe literal text code (case sensitive)