Two college students who are failing their math class kidnap an alien they encounter and force it to do homework for everyone in their fraternity.
There are some cute mathematical passages. For example, here is an explanation of how badly the students were doing:
(quoted from The Unwilling Professor)
Ira's math instructor had informed him, with a kind of loathing respect, that his only salvation lay in recommencing the study of arithmetic  taking five or ten years in the process  and then retiring to a cave for perhaps another fifteen in the vain hope of digesting, through meditation and prayer, the multiplication table. After that, Irv might be ready for elementary algebra, but not, the professor hoped to a merciful God, in this unfortunate institution of higher learning.

And, when the alien sees the students' errorfilled homework answers, he says:
(quoted from The Unwilling Professor)
Ah, I observe that you chaps are beginning the study of elementary mathematics. The limits are wrong on this integration: they should go from piovertwo to pioverthree first instead of to zero. There's a discontinuity at pioverthree, and your result, that the center of gravity of this sixinch cube is nine feet to the right, looks somewhat implausible.

(Of course, the students don't know what a discontinuity is. But, fear not, the alien explains it.)
There are many things here that are hard to believe, not only that the alien looks exactly like a rabbit and speaks perfect British English (learned from the BBC), but that the professors accept the sudden increase in the the frat brothers' math homework grades instead of recognizing that they are somehow cheating. However, if you can suspend disbelief, it is a cute and humorous tale with a nicely twisted ending.
Originally published in Dynamic Science Fiction January 1954. 