Express the function in the formfg. (Use only elementary functions, but not the identity function,g(x) =x.)

AND

Express the function in the formfgh. (Use only elementary functions, but not the identity function,g(x) =x.)

H(x) = 3 - 4^x^2

I am not sure how to start these or even what they are asking for...any help would be greatly appreciated!