(drawn with pencil)
Scribbled on the corner of my math hw. Fun fact: in Japanese there's (at least) two ways to say math - "sansuu" is Elementary School/little kid math, while "suugaku" is the serious stuff.
Neji's talking about the serious stuff.
because back when he was a little shit he very well could've noticed how math's difficultly pissed everyone off and therefore decided to like it
also all his peers would be whining about how tough little kid math was while he'd be flipping through High-school level math packets all like "I'm sorry I can't hear you over the sound of my geniusness doing its thing"
here go the headcanons here they go
* Math .... belongs to itself
* Neji belongs to himself now I suppose, though the manga from which he comes is Kishi's