Evaluate the following function for the input given below:
`f(7)` when `f (x) = (x^2-2+x)/(7x-6)`.
`f(7)=` s
`g(-4)` when `g (x) = (-2x^2+1.7x-4(7-x))/(7.2-3x)`.
`g(-4)=`
`g(m)` when `g (x) = 2/3x-5x^3+x (x+2)`.
`g(m)=`
`f(x+3)` when `f (x) = 2x^2+6x-15`.
`f(x+3)=`