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The statement about the two words only concerns the body, and the formula n² + 2 counts for one word.

Check out THIS word then:

(x = (-b±sqrt(b^2-4 a c))/(2 a))

Why would you count a compound expression, with internal spaces, as one word?

Technically "n^2+1" has no spaces.

And I guess one way to think about it is that terms in an expression can be viewed as letters, so the expression then becomes a word.

How do you pronounce that word?

"n squared plus one"

The spaces are mere typesetting. n^2+2 is the same expression typeset a different way.

"mere typesetting" is a rather offensive way to describe a document typeset in TeX, a system invented to free mathematics from "mere typesetting".

Hey, I've used LaTex. It deserves aspersions as much as accolades :3