Let's get this math done. We have 6786217295 and 7711818545 and we're going to add them all together.

Step 1: We'll start by adding the digits 5 & 5 in column 1 and get 10.
We'll write down the last digit 0 and carry the 1 to the next column.

Step 2: We'll start by adding the digits 9 & 4 in column 2 and get 14.
We'll write down the last digit 4 and carry the 1 to the next column.

Step 3: We'll start by adding the digits 2 & 5 in column 3 and get 8.

Step 4: We'll start by adding the digits 7 & 8 in column 4 and get 15.
We'll write down the last digit 5 and carry the 1 to the next column.

Step 5: We'll start by adding the digits 1 & 1 in column 5 and get 3.

Step 6: We'll start by adding the digits 2 & 8 in column 6 and get 10.
We'll write down the last digit 0 and carry the 1 to the next column.

Step 7: We'll start by adding the digits 6 & 1 in column 7 and get 8.

Step 8: We'll start by adding the digits 8 & 1 in column 8 and get 9.

Step 9: We'll start by adding the digits 7 & 7 in column 9 and get 14.
We'll write down the last digit 4 and carry the 1 to the next column.

Step 10: We'll start by adding the digits 6 & 7 in column 10 and get 14.
We'll write down the last digit 4 and carry the 1 to the next column.

So, 6786217295 + 7711818545 = 14498035840.

