the whole word and nothing but the word

trim string

Matches integer numbers, floats and fractions of floats. I.e. "2", "-3.456", "3/4", "2.1/8".

Matches all alphanumeric (\w), underscore and dash (\-) that is included in square brackets ([]). The result gives two groups that can be used with $1 and $2.

Simples expression to match any words in Greek or Ancient Greek.