Get the exercises here: https://gist.github.com/codebubb/bb19d7ae24cd41695cb3c5ec3b1155d5
01:06 Exercise 1 (Final Answer 05:22)
05:49 Exercise 2 (Final Answer 06:42)
07:00 Exercise 3 (Final Answer 08:33)
09:13 Exercise 4 (Final Answer 10:57)
11:15 Exercise 5 (Final Answer 12:42)
The examples in the exercises are a bit contrived but they've been designed so you get a bit of exposure to some of the basic operations that can be done with RegEx patterns.