Via lots of sources today, the “Batman Equation”. Written out by ipi31415, the equation is:

((x/7)^{2} Sqrt[Abs[Abs[x] – 3]/(Abs[x] – 3)] + (y/3)^{2} Sqrt[Abs[y + (3 Sqrt[33])/7]/(y + (3 Sqrt[33])/7)] – 1)(Abs[x/2] – ((3 Sqrt[33] – 7)/112) x^{2} – 3 + Sqrt[1 – (Abs[Abs[x] – 2] – 1)^{2} ] – y) (9 Sqrt[Abs[(Abs[x] – 1) (Abs[x] – 3/4)]/((1 – Abs[x]) (Abs[x] – 3/4))] – 8 Abs[x] – y) (3 Abs[x] + .75 Sqrt[Abs[(Abs[x] – 3/4) (Abs[x] – 1/2)]/((3/4 – Abs[x]) (Abs[x] – 1/2))] – y) (9/4 Sqrt[Abs[(x – 1/2) (x + 1/2)]/((1/2 – x) (1/2 + x))] – y) ((6 Sqrt[10])/7 + (3/2 – Abs[x]/2) Sqrt[Abs[Abs[x] – 1]/(Abs[x] – 1)] – (6 Sqrt[10])/14 Sqrt[4 – (Abs[x] – 1)^{2} ] – y) == 0

Via: Boing Boing