matching value of html src attribute

I need to get the top level domain from the request header but it can be in a vary ways.. how can I match but exclude parts I dont want to get ie. ports

Eliminate spaces in the inner part of parenthesis.

I am asking for help in writing a regular expression to shorten this expression. I need the string below to search every interface within the range of 1 -24 to validate the configuration. If one interface does not have the required configuration then the expression fails. interface GigabitEtherne...

Validates most email addresses. Using the range [A-Za-z0-9] at the beginning instead of \w means an address cannot begin with an underscore. This range is also used to exclude underscores from the domain (part after @).

See if a string is in CamelCase format

Match nth occurence of the patterns in the inner parenthesis. Put nth that you want to match in the curly braces (here, {3}).

States (US) 2 char format, matches: Ga or GA

Detect various possible HTML linebreak tags (eg. )

Validador de CPF

use this to get value of any side of an equation. You can combine this with https://regex101.com/r/fH5kJ1/1

Detects valid Roman numerals (up to 3999), and splits into 4 capture groups: thousands, hundreds, tens, and units.