# How do you evaluate -9^ { 2} + 5\cdot - 9- 7?

$- 133$
$- 81 + 5 \cdot - 9 - 7$ exponents first (we do the ${9}^{2}$ before multiply it by $- 1$)
$- 81 - 45 - 7$ multiplication next
$- 133$ subtract everything