Evaluate the following function for the input given below:

1. `f(7)` when `f(x) = (x^2-5+x)/(5x-5)`.

   `f(7)=`   s

2. `g(-5.1)` when `g(x) = (-5x^2+1.7x-4(7-x))/(8.6-4x)`.

   `g(-5.1)=`  

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

   `g(m)=`  

4. `f(x+1)` when `f(x) = 4x^2+8x-12`.

   `f(x+1)=`