A while ago, I had an assignment for my B&W class about 2 years ago for a photo essay. This is what I came up with, with a little help from my uncle the mathematician.
The idea of the essay was numbers and how they are all around you. I went around the city of Pittsburgh late at night with my calculator in hand searching for numbers. The numbers of Pi.
This was some of my very early work in photography, let alone film developing circa 2006.
It's short for a photo essay, but it gets the point across.