It's some sort of Anarchist plot.
@MostlyHarmless definitely the most creative graffiti I've ever seen

@MostlyHarmless alt text:

Left, a wall with five mathematical formulae stencilled onto it, all functions of X. Right, a plot of all five functions on a graph. Three straight lines intersect to resemble a capital "A", and the remaining functions create the two halves of a circle around the "A", forming the "anarchy" symbol.

@contrary_k @MostlyHarmless That even helps the fully-sighted - I was wondering why there were 5 plots!
@MostlyHarmless
I didn't know Rene Descartes was an anarchist!
@MostlyHarmless
Wow that's a graffiti I haven't seen in a long time!
http://wok.oblomov.eu/ars/mathematical-anarchist/
The mathematical anarchist

wok
@MostlyHarmless It's terrorism, someone is deploying graffitti of Maths Instruction!
@MostlyHarmless I boost not because I think anarchy is the best way, but because it's clever.
@MostlyHarmless It's a dad joke, it's a math joke, it's a punk joke.

It's Dadpunk, Math Edition.
@MostlyHarmless I would have written the circle as (x-2)²+(y-2)²=1
@marbles @MostlyHarmless was gonna say, as cool as it is, it's funny that their partial understanding of math and how to use the calculator undercuts the anarchy. "This graffiti was made possible by public education and Texas Instruments."
@MostlyHarmless LMAO MY CALCULUS TEACHER ACTUALLY MADE US DO THIS AT UNI