Hello!

I just need a little help with the next few problems. I keep getting these type wrong and it's a little frustrating. Any help is appreciated. Thanks, so so much.

A. given: f(x)=$\displaystyle (x+5)/x$ and g(x)=$\displaystyle x^2-3$, find (g o f)(-9)

B. simplify the following:

7 + __b____

.......7 + __7__

.................7 + b

The ..... are just for spacing. I know thats a rough picture but I think you get the point? Thanks.