I have a problem in a book I am trying to accomplish.
I understand the overall type of the expression is boolean and how it derives. (y * x) will be rule 4 (counting from top right). (y * x) + x when evaluated will be rule 3 and the overall expression when evaluated will be rule 5.
What I want to figure out is what is the correct way to illustrate the my working? Can someone give or link an example of the correct way to answer a question like this?