Evaluate the following function for the input given below:
`f(7)` when `f (x) = (x^2-2+x)/(6x-4)`.
`f(7)=` s
`g(-4.9)` when `g (x) = (-4x^2+1.6x-4(7-x))/(7.8-4x)`.
`g(-4.9)=`
`g(m)` when `g (x) = 2/3x-4x^3+x (x+4)`.
`g(m)=`
`f(x+3)` when `f (x) = 3x^2+7x-15`.
`f(x+3)=`