Gretchen Ertl for The Boston Globe

MIT student Justin Brereton pumped his fist after getting the first integration problem correct in the final round of the MIT Integration Bee.

Gretchen Ertl for The Boston Globe

Freshman Ben Kraft worked on a problem during the first round.

Gretchen Ertl for The Boston Globe

Yi Sun, middle hand, explained his quickly scribbled answer to the judges.

Gretchen Ertl for The Boston Globe

Similar to March Madness, students filled out a bracket and threw in a dollar to join the pool.

Gretchen Ertl for The Boston Globe

MIT students who were not competing, including Alex Cole, center, cheered for their favorite competitor.

Gretchen Ertl for The Boston Globe

Brereton was declared the Grand Integrator after going four rounds and getting the most problems correct in the Integration Bee.