Evaluating inside of parentheses is quite simple, actually. Just remember that if you have multiple operations within a set of parentheses, abide the rules of the order of operations inside of those parentheses.
I'll evaluate your given expression to demonstrate this:
\(3 (( 2+4)-5)\) | Good! You have identified the set of parentheses from left to right. However, there is an inner set of parentheses. Do that first! Why? |
\(3(6-5)\) | Yet again, do 6-5 because it is prioritized by the parentheses. |
\(3(1)\) | 3(1)=3*1. Evaluate this. |
\(3\) | |