<span>a small piece, part, or quantity of something. i hope this helps
</span>
Maybe color each number a specific color? like all the boxes with 10 in them are yellow
Sublingual, IV, IM, insufflation, Skin absorbtion, Plugging, inhalation, eye absorbtion, and of course, swallowing. Discounting Skin and eye absorbtion, youve got 7 so i would go with that.
This looks kinda scary but I think the answer for #12 is x81 + 1,296 x729 + 4,096 and that would go to 2x810 + 5,392 so those are some big numbers but a lot easier to simplify.