The dual of a cough. Because he wasn't Abel. Lumberjacks make good musicians because of their natural logarithms. My geometry teacher was sometimes acute, and sometimes obtuse, but always right. Statisticians probably do it.
Algebraists do it in groups.
Remember Americans pronounce z 'zee'. Integral z-squared dz From 1 to the square root of 3 Times the cosine Of three pi over 9 Equals log of the cube root of 'e'. A little longer Three men are in a hot-air balloon. Soon, they find themselves lost in a canyon. We can call for help in this canyon and the echo will carry our voices far.