Refactoring Techniques and code smells

[carloscabani]

How's it going?, here there is a part of college task, you can find some refactoring techniques and code smells to improve understanding of the code.
https://docs.google.com/document/d/1XmcqV8jgo0c76xuZsqaE07jWiewG4vebtbO72EUpcC8/edit