Evaluate the following function for the input given below:
`f(7)` when `f (x) = (x^2-4+x)/(9x-4)`.
`f(7)=` s
`g(-5.5)` when `g (x) = (-4x^2+1.9x-3(7-x))/(8.2-2x)`.
`g(-5.5)=`
`g(m)` when `g (x) = 2/3x-6x^3+x (x+5)`.
`g(m)=`
`f(x+4)` when `f (x) = 3x^2+7x-15`.
`f(x+4)=`