Evaluate the following function for the input given below:

1. `f(8)` when `f (x) = (x^2-5+x)/(5x-4)`.

   `f(8)=`   s

2. `g(-4.6)` when `g (x) = (-5x^2+1.2x-3(7-x))/(7.1-4x)`.

   `g(-4.6)=`  

3. `g(m)` when `g (x) = 2/3x-6x^3+x (x+4)`.

   `g(m)=`  

4. `f(x+1)` when `f (x) = 3x^2+5x-15`.

   `f(x+1)=`