It's too large to match with all which seems like an IPv6. It's not perfect, but it's detects more valid IPv6 than some others regex.

This is a Regex to the Whatsapp chat data. This parses the G1 - Date, G2 - Time, G3 - User, G4 - Qualifier & G5 - Actual chat data. The Qualifier (G4) identifies the group Creation information, : that separates the User and Ping chat data and New user added chats.

complex number

1 Uppercase 1 lower case 1 number 1 not a number or letter

Retrieve the first numeric parameters of the SPECGRID keyword

a

exactly 3 -_- after cm_mmc

grabs p-values