Not sure about "nonsensical calculation", but our brains perform computation (read: they transform information). In fact, that is what the brains are for (see:

Not sure about "nonsensical calculation", but our brains perform computation (read: they transform information). In fact, that is what the brains are for (see: biology 101). As for mathematics, I am with Galileo: it is the language of the universe. Of course, we "invented" its silly glyphs and the like, but those are secondary. My 2 cents.