Christmas Carol parodies?

<p>You're probably getting sick of hearing Christmas songs about now. So does anyone have some good parody versions? Post lyrics of some funny ones here.</p>

<p>this one was off the song “oh christmas tree”
Oh, Calculus; Oh Calculus,
How tough are both your branches.
Oh, Calculus; Oh Calculus,
To pass, what are my chances?
Derivatives I cannot take,
At integrals my fingers shake.
Oh, Calculus; Oh Calculus,
How tough are both your branches. </p>

<p>Oh, Calculus; Oh Calculus,
You theorems I can’t master.
Oh, Calculus; Oh Calculus,
My proofs are a disaster.
You pull a trick out of the air,
Or find a reason, God knows where.
Oh, Calculus; Oh Calculus,
Your theorems I can’t master. </p>

<p>Oh, Calculus; Oh Calculus,
Your problems do distress me.
Oh, Calculus; Oh Calculus,
Related rates depress me.
I walk toward lamp posts in my sleep,
And running water makes me weep.
Oh, Calculus; Oh Calculus,
Your problems do distress me. </p>

<p>Oh, Calculus; Oh Calculus,
My limit I am reaching.
Oh, Calculus; Oh Calculus,
For mercy I’m beseeching.
My grades do not approach a B,
They’re just an epsilon from D.
Oh, Calculus; Oh Calculus,
My limit I am reaching.</p>