Answer
78
Work Step by Step
We follow the instructions to plug 5 in for m and 3 in for n, and then we simplify using the order of operations. According to the order of operations, we simplify inside of parentheses, then we simplify powers, then we multiply and divide, and finally, we add and subtract. When we do this, we find:
$3 \times (5^{2}) +3 = 3 \times 25 +3 = 75+3 =78$
