To calculate ((999^2 - 1) / 998), we can simplify it step by step.

1. Calculate (999^2):
   [
   999^2 = 998001
   ]
2. Subtract 1:
   [
   999^2 - 1 = 998001 - 1 = 998000
   ]
3. Now, divide by 998:
   [
   \frac{998000}{998} = 1002
   ]

Thus, the final result is:
[
\frac{999^2 - 1}{998} = 1002
]

Wtf, ChatGPT?!