And while I have long since forgotten how to solve a differential equation, I did learn how to drink responsibly (no tequila shots on an empty stomach).

FORBES: Grownup Training

Taking the rail idea a step further and looking to further solve the differential equation, Plains All American Pipeline (NYSE:PAA) is converting a former Virginia refinery to offload crude railcars and then shift their cargoes to ships to move crude oil along the coasts of the United States, profiting from price differentials.

FORBES: Differential Equations: The Rangeland Energy deal and the big picture