Regular Expressions 101

Explanation
Pro

Group 1((\d+\.?\d*) ([a-zA-Z]) \*)

Group 2(\d+\.?\d*)

\d+a digit, repeated at least once

\.?optionally matches the literal . (46₁₀ / 56₈ / 2E₁₆)

\d*a digit, repeated any number of times

the literal (32₁₀ / 40₈ / 20₁₆)

Group 3([a-zA-Z])

Character Class[a-zA-Z]

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

the literal (32₁₀ / 40₈ / 20₁₆)

\*the literal * (42₁₀ / 52₈ / 2A₁₆)

Group 4(.*?)

.*?any character (except for line terminators), repeated any number of times

Group 5(((\d+\.?\d*) \3 \*))

Group 6((\d+\.?\d*) \3 \*)

Group 7(\d+\.?\d*)

\d+a digit, repeated at least once

\.?optionally matches the literal . (46₁₀ / 56₈ / 2E₁₆)

\d*a digit, repeated any number of times

the literal (32₁₀ / 40₈ / 20₁₆)

\3the text saved by group 3

the literal (32₁₀ / 40₈ / 20₁₆)

\*the literal * (42₁₀ / 52₈ / 2A₁₆)

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

Detailed match information will be displayed here automatically.

25 tokens

((\d+\.?\d*) ([a-zA-Z]) \*)(.*?)(((\d+\.?\d*) \3 \*))

2 x * 3 y * + 3 x * + 4 y * + 3 x * +

$3 $2 $6 + * $4

2 x * 3 y * + 3 x * + 4 y * + 3 x * +