I am attempting to do some Boolean algebra for my computer organization class. I have gotten the first seven problems done, but for the last four, I am confused. The question for all of them is the same- 'Simplify each expression to Minimal Sum of Products form. Show each step and label it with the properties of boolean algebra.' I know the properties and symbols. However, the website our notes are given from is vague, and only gives one example. Could someone kindly give me a basis, that way I can solve these? For example, one of the problems says 'a(X,Y,Z)=X+Y'Z+Z'(X+Y'Z)'. I am not asking for this to be done for me, just if someone can give me a basis to serve as a starting point. Thank you for any help.

*I'm not entirely certain if this format of boolean algebra applies for this website, but it is part of our homework criteria.