Here's a couple of
math rhymes I know:
I used to think math was no fun
'Cause I couldn't see how it was done
Now Euler's my hero
And I now see why zero
Equals eiπ+1
'Tis a favorite hobby of mine
A new value of pi to assign
I would fix it at three
For it's easier, you see
Than 3.14159
Rascally Kitten tells me that Harvey L. Carter wrote that second one. Excellent!