<p>My math teacher just made this her FB status (Yes, I am friends with my math teacher on FB):</p>
<p>“Three transcendental functions are sitting in a bar, chatting (how fast their terms go to zero etc.). Suddenly, one cries “Beware! Derivation is coming!” All immediately hide themselves under the tables, and only the exponential function sits calmly on the chair.”</p>
<p>If you understand it, maybe it’s funny.</p>