Surprising that not everyone knows this

Yeah, yeah, it's been a long time since updating and all that. (Ever read those old Peanuts cartoons in which they write to their pen pal? Almost every letter begins with a variant of "sorry I haven't written in so long...")

Anyway, Jennifer is still pregnant, and getting more very pregnant every minute. (she's due January 20th)

So enough about life; I'm going to talk about math.
( Something your middle- or high-school algebra teacher should have told you, and probably didn't )