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Heh, you just might not have known the short form "maths".

Mathematics. "Математик", isn't it?

I think we're talking about maths here, not doodling :P.

N.B.: to doodle (int. v.) - to draw casually, often absent-mindedly.

(1+1+1)!

I don't know if it's OK because the factorial sign is after and not between.[/quote]

That's perfectly acceptable. It's just 3!.