Answer:

Explanation:
Add brackets around the 10 - 5 part of the equation and around the 9 + 3 part of the equations. This means that 10 - 5 will now be evaluated first, and then 9 + 3. Finally, the result of 10 - 5, which is 5, will be multiplied with the result of 9+3, which is twelve, for a result of 60.