Answer:
(7+6) x (4+5)
Explanation:
Since both 7+6 and 4+5 are being added, the parenthesis around them shows that. Parenthesis come first in solving equations, so the steps would look like:
(7+6) x (4+5)
13 x 9
177
In any other equation, the wrong numbers would be multiplied. Like option 3, what would happen would be:
7+(6x4)+5
7+24+5
36