[Israel.pm] patterns findings

[Yossi Itzkovich]

Hi,
I am looking for a module that will get a file with text lines, and will find repeating patterns. 
Example:  given the following file:
-----
I want to go home
1+3=4
Hello World
1+3=4
Hello World
8+2=10
Hello World
Klskd
-----
The script should tell me that the sequence : 1+3=4  and Hello World repeat 2 times.  A better script may tell me even that the more general pattern: {number}+number}={number} and Hello World  repeat 3 times.

Any suggestion?

Thanks
Yossi