Pi, Sigma, Radius, Delta (AKA: NERD)
The word "Nerd" made out of Pi, Sigma, radius(or correlation if you prefer statistics), and lowercase delta.
The equations very from finding force, the quadratic formula, the mandlebrot set, the pythagoreom theorem, e=mc^2, Binomial area, the equation for pi, and the area of a circle. They're real math equations varying from algebra to advance calculus and statistics.
The equations on the sleeves (for finding area and Pi) are optional. They may be removed depending on feedback.
Just three colors: White, Red, and Grey.