Hello everyone! I apologize for posting often, but math help forum is my only help nowadays. I moved on to other questions of my assignment just to get some progress.

I'd greatly appreciate it if anyone would take a look at my work for me and tell me where I went wrong or if what I've done is right.

Here's the problem:

Here are my solutions. I am super confused with the laws and to what extent i can apply them on.

Thank you so much!