Evaluate the following function for the input given below:
`f(6)` when `f(x) = (x^2-3+x)/(8x-4)`.
`f(6)=` s
`g(-4.3)` when `g(x) = (-5x^2+1.7x-3(6-x))/(7.4-3x)`.
`g(-4.3)=`
`g(m)` when `g(x) = 2/3x-7x^3+x(x+2)`.
`g(m)=`
`f(x+4)` when `f(x) = 5x^2+8x-13`.
`f(x+4)=`