I would have put this in the same thread as my other ones, but I've been told that its better not to clutter up one thread with too many questions. Here are two more practice problems I was having trouble with.

For this one, I'm not sure what I should do. It seems that I should be applying the Sum, Difference, and Constant Rules, but I'm not sure where I should begin with this one.

For example, for (a), should I simply add f(x) + g(x) and plug in 2 for the x value?

(6x+2) + (6x-2) = 12x = 24? I know thats probably wrong as it seems too easy to be the solution to the question.