<tr classthe literal text <tr class (case insensitive) =?optionally matches the literal = (6110 / 758 / 3D16)
Rthe literal R (8210 / 1228 / 5216) (case insensitive)
3?optionally matches the literal 3 (5110 / 638 / 3316)
>the literal > (6210 / 768 / 3E16)
.*?any character (except for line terminators), repeated any number of times
<the literal < (6010 / 748 / 3C16)
\/the literal / (4710 / 578 / 2F16)
TR>the literal text TR> (case insensitive) i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters