Lyric discussion by SixGunGorgonDynamo 

Cover art for The Math Song lyrics by Darkest of the Hillside Thickets, The

I'm pretty sure the first verse is suppose to be:

Y Y equals X over 5 5 to the power of psi Psi is the square root of 3 3 is the number for me I said

In reference to: http://en.wikipedia.org/wiki/Psi_%28letter%29