#### Answer

$32$

#### Work Step by Step

Evaluate using the PEMDAS rule for order of operations. The PEMDAS rule summarizes the order of operations:
First Priority; P - parentheses
Second Priority: E - exponents
Third Priorirty: M/D - multiplication or division, whichever comes first from the left
Fourth Priority: A/S - addition or subtraction, whichever comes first from the left
Simplify within grouping symbols first::
$=(-5)(-8)-2^3$
Next, apply the exponent to obtain:
$=(-5)(-8)-8$
Multiply:
$=40-8$
Subtract:
$=\color{blue}{32}$