The quadratic equation, Dr. Seuss style

I've been busy, but here's a quick one: The quadratic equation, Dr. Seuss style, by Katie Benedetto. My favorite stanza:

Each value there was, well she renamed each one
Claiming that nice names would make this more fun.
“Variables, well, they’re whatever we wish
So like one, two, red, blue, I’ll call this one “fish”!

This is the antidote to if the IRS had discovered the quadratic formula.

Sestinas

Best mathematical poem ever: S_{|{e,s,t,i,n,a}|}, by Caleb Emmons. This is a sestina that explains what a sestina is, using the language of the symmetric group. (A sestina is a certain highly structured kind of poem. I won't say more. See the Wikipedia article on them if you have trouble with the poem.)

(I actually had a longer post about the mathematics of sestinas written, but the computer ate it. Oh well.)