These are all hilarious, even the immature ones! (And I usually hate immature humor, so that's saying something.) I think my favorite so far is "Expand the equation". :)
EDIT: Now that I've read all of the posts as of "Chem win", my new favorite is the one where Walt Whitman has a blue ox named Emily Dickinson. Even if a later portion of that essay stereotypes LiveJournal as being for emo poetry.
In other news, now I have notes for all my exam essays, or exays, and have about half of my The Great Gatsby essay finished. Yay!