Answer: 78
Explanation: Whenever we deal with an evaluation problem, make sure to always use parenthses when substituting numbers in for variables.
Notice that we have a set of parenthses in our original problem.
To avoid the confusion of having too many sets
of parenthses, let's change the parenthses to brackets.
So we have 2(3) [(5) + 8].
Simplifying from here, we have (6) [(13].
Multiplying, we get 78.
