Got it! So, we have 992991002 and 459940588, and we'll subtract the latter from the former.

Step 1: We'll start by subtracting the digit 8 and the borrow 0 from 2 in column 1 and get -6.
We add -6 to 10 and get 4 as the first digit of the result.

Step 2: We'll start by subtracting the digit 8 and the borrow 1 from 0 in column 2 and get -9.
We add -9 to 10 and get 1 as the next digit of the result.

Step 3: We'll start by subtracting the digit 5 and the borrow 1 from 0 in column 3 and get -6.
We add -6 to 10 and get 4 as the next digit of the result.

Step 4: We'll start by subtracting the digit 0 and the borrow 1 from 1 in column 4 and get 0.
0 is the next digit of our result.

Step 5: We'll start by subtracting the digit 4 and the borrow 0 from 9 in column 5 and get 5.
5 is the next digit of our result.

Step 6: We'll start by subtracting the digit 9 and the borrow 0 from 9 in column 6 and get 0.
0 is the next digit of our result.

Step 7: We'll start by subtracting the digit 9 and the borrow 0 from 2 in column 7 and get -7.
We add -7 to 10 and get 3 as the next digit of the result.

Step 8: We'll start by subtracting the digit 5 and the borrow 1 from 9 in column 8 and get 3.
3 is the next digit of our result.

Step 9: We'll start by subtracting the digit 4 and the borrow 0 from 9 in column 9 and get 5.
5 is the next digit of our result.

So, 992991002 - 459940588 = 533050414.