Answer
$-31$
Work Step by Step
Order of operations:
(Mnemonic: Please Excuse My Dear Aunt Sally)
(Parentheses, Exponents, Multiplication/Division, Addition/Subtraction)
... parentheses first...
$2(-30-(-3))-3(6-9)+(-1)(1-15)=$
$= 2(-30+3)-3(-3)+(-1)(-14)=$
$= 2(-27)-3(-3)+(-1)(-14)=$
... multiplication ...
$=-54+9+14$
... addition/subtraction ...
$=-45+14$
$=-31$
