Chapter 1.3, Problem 64E

For each pair of functions, find (a) $f\left(g\left(1\right)\right)$, (b) $g\left(f\left(1\right)\right)$, (c) $\left(f\circ g\right)\left(x\right)$, (d) $\left(g\circ f\right)\left(x\right)$.

$f\left(x\right)=x^2-1$ and $g\left(x\right)=-2$