Given f(2)=3, f(3)=4, f(5)=0, g(2)=5, g(3)=2, g(4)=-1, how do you evaluate f(g(2))?
It's all about taking this one step at a time, and not getting freaked out by the scary-looking composition.
So, given your information, you need to find
It's given that
And of course, it is also given that
Make sure you understand compositions of functions well -- they will come back in a big way when you start calculus!
Hope that helped :)