Evaluate the following function for the input given below:

1. `f(8)` when `f (x) = (x^2-2+x)/(7x-4)`.

   `f(8)=`   s

2. `g(-5.2)` when `g (x) = (-4x^2+2x-2(6-x))/(8.5-5x)`.

   `g(-5.2)=`  

3. `g(m)` when `g (x) = 2/3x-6x^3+x (x+6)`.

   `g(m)=`  

4. `f(x+4)` when `f (x) = 4x^2+6x-15`.

   `f(x+4)=`