#### Answer

$-s^2-7s-2$

#### Work Step by Step

We start with the given expression: $s-4-(s^2-2)-8s$
We apply the distributive property: $s-4-s^2+2-8s$
We rearrange the terms using the commutative property of addition: $-s^2+s-8s+2-4$
We combine like terms using addition and subtraction: $-s^2-7s-2$