@professionalbronco No worries about the bump! Super glad to see you learning so much, and even coming back to correct an old post 🙂

You're absolutely right, these sums don't converge, so you can't manipulate them as if they were actual equations. In fact, $$1+2+3+4+...=-\frac{1}{12}$$ is just really misleading in general. While $$-\frac{1}{12}$$ is related to it, it's not really "equal" to it in the normal sense.

Great job once again!