Wikimedi'Òc

Regexper; a or (b, c star).png - Watchduck

Regexper; binary numbers that are multiples of 3.png - Watchduck

Regexper; a or b star.png - Watchduck

Regexper; numeral.png - Watchduck

Regexper; email.png - Watchduck

Regexper; Kleene star of (a, b, c).png - Watchduck

Regexper; a, b star, c optional.png - Watchduck

Regexper; comma separated hex numbers.png - Teslaton