CPM Homework Help : AC Problem 12-69

If $f\left(x\right)=\frac{-5}{x+2}$ and $g\left(x\right)=\left(x-2\right)^3$ , find each output value below (if possible). If it is not possible, explain why not.

$f\left(-7\right)+g\left(1\right)$
Hint (d):
Substitute $-7$ for $x$ in $f\left(x\right)$ and $1$ for $x$ in $g\left(x\right)$ ,
then add the results together.
Answer (d):
$1+\left(-1\right)=0$

$f\left(3\right)-g\left(2\right)$
Hint (e):
See the help for part (d).