"College Exam Plea" joke

O Lord, hear my anxious plea
Calculus is killing me
I know not of' dx' or' dy'
And probably won't until the day I die.
Please, Lord, help me in this hour
As I take my case to the highest power.
I care not for fame or loot
Just help me find one square root.
And Lord, please let me see
One passing mark in organic chemistry.
Oh such a thing I constantly dread
I'd just as soon join the Marines instead.
Lord, please give me a sign
That you've been listening all the time.
Please lead me out of this constant coma
And give me a shot at my diploma.