Jack Lance@Jack_L_LanceThe second derivative of your mouth is your happiness.11:14 AM · Mar 31, 2015·Twitter Web Client1 Retweet
edderiofer@edderiofer·Apr 1, 2015Replying to @Jack_L_Lance@Jack_L_Lance d2(mouth(x))/dx2 = happiness(x)? I'm not sure I get this one.1
Jack Lance@Jack_L_Lance·Apr 1, 2015Replying to @edderiofer@edderiofer Consider what happens when happiness is positive or negative.1
