#### Answer

-12

#### Work Step by Step

To answer the question, substitute the given n and m values into the expression.
1. 4((2$\times$ -15) - (-18)) - 3((2$\times$ -15) - (-18))
2. 4(-30+18) - 3(-30+18). Start by simplifying inside the parentheses, keep in mind when subtracting a negative number, it is equivalent to adding that number.
3. 4(-12) - 3(-12)
4. -48+36
5. =-12