To calculate this expression, we follow the order of operations:

First, perform the multiplication:
1634*87 = 141858

Next, perform the addition:
141858 + 952 = 142810

Then, perform the division:
142810 / 28 = 5100.357142857

Next, perform the subtraction:
5100.357142857 - 2836 = 2264.357142857

Finally, perform the division:
2264.357142857 - 99500 = -97235.642857143

Therefore, the final result is approximately -97235.642857143.