Answer:
160
Step-by-step explanation:
12r + (s-t)^2
Let r = 5, s = -3, and t = 7.
12 * 5 + ( -3 -7) ^2
PEMDAS says parentheses first
12 * 5 + ( -10) ^2
Then exponents
12 * 5 + 100
Multiply and divide from left to right
60 +100
Add and subtract from left to right
160
