"Mathematical lyrics" joke

This poem was written by Jon Saxton (an author of math textbooks).
((12 + 144 + 20 + (3 * 4^(1/2))) / 7) + (5 * 11) = 9^2 + 0
Or for those who have trouble with the poem:
A Dozen, a Gross and a Score,
plus three times the square root of four,
divided by seven,
plus five times eleven,
equals nine squared and not a bit more.
'Tis a favorite project of mine
A new value of pi to assign.
I would fix it at 3
For it's simpler, you see,
Than 3 point 1 4 1 5 9.
("The Lure of the Limerick" by W.S. Baring-Gould, p.5. Attributed to Harvey L. Carter).
If inside a circle a line
Hits the center and goes spine to spine
And the line's length is "d"
the circumference will be
d times 3.14159
If (1+x) (real close to 1)
Is raised to the power of 1
Over x, you will find
Here's the value defined:
2.718281...
Here's a limerick - looks better on paper.
/3
/
| 2 3 x 3.14 3_
| z dz x cos( ---) = ln (/e )
| 9
/
1
Which, of course, translates to:
Integral z-squared dz
from 1 to the square root of 3
times the cosine
of three pi over 9
equals log of the cube root of 'e'.
And it's correct, too.