Consider the following.

$f(x)=\frac{x}{x+5},g(x)=8x-5$

$(a)$ Find the function $(f$@$g)(x).$

$(f$@$g)(x)=$

Find the domain $of(f$@$g)(x).(Enter$ your answer using interval notation.$)$

$(b)$ Find the function $(g$@$f)(x).$

$(g$@$f)(x)=g$@$fx(f$@$f)(x).$

$(f$@$f)(x)=f$@$fx(g$@$g)(x).$

$(g$@$g)(x)=$

Find the domain $of(g$@$g)(x).(Enter$ your answer using interval notation.$)$