2+5-75+28+4638+5883+84-9-+49-7

To perform the calculation, simply follow the mathematical operations in the given order:

2 + 5 - 75 + 28 + 4638 + 5883 + 84 - 9 - 49 - 7

Looking at the sequence, we have a stray minus sign before the +49 which seems like a typo. Assuming that the intended sequence was:

2 + 5 - 75 + 28 + 4638 + 5883 + 84 - 9 + 49 - 7

Now, let's calculate it step by step:

First, let's combine all the positive numbers:

2 + 5 + 28 + 4638 + 5883 + 84 + 49 = 10689

Next, let's combine all the negative numbers:

-75 - 9 - 7 = -91

Finally, let's add the sum of the positive numbers to the sum of the negative numbers:

10689 - 91 = 10598

Therefore, the answer is 10598.