Answer:
1. It is true because if you take off the n's and then do it you get 7 and when you add the n's back on that is your answer 2. It is true because even if you put parentheses you still get the same answer 3.What is in the parentheses equals 0 and 5 - 0 is 5 4. You get the same answer even though the 6n and 2 are flipped flopped.
Explanation: