We can absolutely say what happens to equations with big n, math has no problem talking about large numbers. n > n * n for n > 1 for instance is fundamentally true - by virtue of our definitions of "1", "integers", ">" and "n * n", our logical system (generally zfc), and our definition of true.

That's not to say that the real world physics will continue to match our models for big n, or anything like that. Just that our abstract mathematical models continue to "work".