What is a good tattoo idea pertaining to math?

What is a good tattoo idea pertaining to math?
I've alwasy really wanted one and I've thought about maybe just getting e^pi(i)+1=0 since it contains 4 cool points of math being e, pi, i , and 0.

thoughts?

Smith chart would be a pretty neat whole back tattoo imho.

platonic solids and their graphs

sine table

looks like goatsee

>falling for the pi meme
>using the 'complex' plane instead of the Clifford algebra equivalent

The graph of y = |sin(x)| + 5*exp(-x^100)*cos(x), -3 ≤ x ≤ 3

unless you are the inventor of the formula, dont get it tattooed on you

You want to show the world how cool and smart you are?

just get a small proof of infinitely many primes on the right side of ur back and another proof like 4 color theorem or something