(note: the bottom three are bad examples)
Dreek Owen
Carlos Ransom
Chris Adamek

basically, as i usually tell people, imagery always looks better than plain text, which is what most science/math tattoos consist of.  the ones on the top are very bold and well-designed while the bottom three are so boring, flat, and won’t hold up very well over time.  i hope this comparison is helpful
here’s another one i like but i can’t find a source anywhere