I have wanted to get a tattoo for years but I have two problems with it. I want it to be significant enough where I look back and think it's stupid. I'd wanted to get an integral I'd discovered in college, but there's no solution to it(which was what makes it memorable) and I am not sure it is the kind of thing I want on me forever. Second, I want something that will fit on a small part of my body. So given these two things, what would you suggest?