math 6 abstract 3 fractal 3 geometric 3 homegrown 3 sprucezeus 3 cirno 2 touhou 2 3d 1 angry 1 artist_request 1 chalkboard 1 chibi 1 diagram 1 frown 1 monochrome 1 o_o 1 science 1 sketch 1 truth 1 wings 1 animu 1 bullet 1 busujima_saeko 1 english 1