Apologies if it seems like a dumb question, not a math guru.

At the first example when we say that we have changed every variable with n^3 shouldn’t that imply that following equation 3n^6+4n^4+2n^3 ? i don’t quiet get that, also on what basis we decided to replace?

Thanks in advance

Course: Big-O Notation - Learn Interactively

Lesson: Educative: Interactive Courses for Software Developers