Answer
$-72$
Work Step by Step
Recall, in order to solve problems involving order of operations, we use the PEMDAS rule.
First Priority: P - parentheses and other grouping symbols
Second Priority: E - exponents
Third Priority: M/D - Multiplication or division, whichever comes first from the left to the right
Fourth Priority: A/S - Addition or subtraction, whichever comes first from the left to the right
Apply the exponents first to obtain:
$=(-3)(-3)(-3) -3(3)-6(6)
\\=-27- 9 -36$
Subtract next, and then add last to obtain:
$=-36 -36
\\=-72$
