I'm greatly enjoying following Doron Zeilberger's glee in this paper, arxiv.org/abs/1208.2258, via @PeterKagey, as he avoids using Taylor series, then radicals, then even subtraction, to prove a result in combinatorics

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In reply to @christianp

@PeterKagey he waves away operations like a sleight-of-hand magician vanishing your watch. It's a sight to behold

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