Select all that are equivalent to sin Sin

For f(x)=2x+3 and g(x)=x^2- 8 find (f+g) (x)

Asap! i'm not good math and i'm lost.

If you have a set of parallel lines a and b cut by transversal x, if angle 1 = 167 degrees, what is angle 4 and why. also what is the measure of angle 5 and why? you need to use the names of the angle relationship and explain.