Can someone integrate this equation? This joke comes from my father, who taught at a mostly black high school During a calculus lecture: ""Can someone come to the board and integrate this?"" he says, pointing to an equation He looks around, wondering why no one has answered Once again, he asks ""Can someone come up and integrate this?"" He does this several times, until a large, 200 lb football player from the back stands up and says ""Doc, have you got a black piece of chalk?""