Expanded notation form of 9,003,840,165

9,000,000,000 + 3,000,000 + 8,000,00 + 4, 000,0 + 100+ 60+ 5

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.