2101029+277373839-100000

The calculation can be simplified as follows:

2101029 + 277373839 - 100000

First, add 2101029 and 277373839:

2101029 + 277373839 = 279474868

Now, subtract 100000:

279474868 - 100000 = 279374868

So, the final result is 279374868.