The answer is 6. Simply add the numbers together arithmetically as you would for the problem two plus two. To check your work, a calculator is the best option.
6
-6
0
-6 + 0 = -6
0
31
6
What is the sum of 0 + 6
236226 + 5262320320 + 6 + 25 + 0 + 65 = 5262556642
30
6 / 6 = 0 + 1
It equals 6
-6.