try changing the order of the expressions, but keep in mind to make sure the symbols remain the same. If you are still not sure, try googling it. There are many websites that allow you to key in the problem, and it will walk you through step by step. (search cymaths) Hope this helps. If you are still not sure, feel free to ask me
For this, you will need to learn the basics of Algebra. With that knowledge, you will then have to go step by step up to more complex algebra. When you have all that knowledge, you can do this worksheet. Also, in your case this algebra is about simplifying algebraic expressions. You will need to simplify all of them. It's just like order of operations but with algebra.
