sum = 2+4+ 6 might work.
6
The sum is 6.
6 - 4 = 2.
4 + 2 = 6
6
It is: 2*(6+4) = 20
6
10
-2
The difference, in a subtraction sum, is the answer to the sum. For example, the difference between 6 and 4 is equal to 2. 6 - 4 = 2.
Sum = 24 Count = 4 Mean = Sum/Count = 24/4 = 6