Big Oh

If you know the sum of all natural numbers up to n is O(n^2), and you factor that out of another expression so you get n*(1+2+...+n), can you say that expression is n*O(n^2) = O(n^3) or is that not allowed?

>>1
It's not allowed.

You're black.

This is typical of a DICKS/COCKS thread

Yes.

sage to remove the cancer threat and send the newfags back to /b/

>>5
Black.