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@Pierre_Tranche: @Pierre_Tranche From a spiral to shadow circles. #lines #mathphoto16 https://t.co/kHep8a4bQN | by tads2

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@Pierre_Tranche: @Pierre_Tranche From a spiral to shadow circles. #lines #mathphoto16 https://t.co/kHep8a4bQN

@Pierre_Tranche From a spiral to shadow circles. #lines #mathphoto16 t.co/kHep8a4bQN - @Pierre_Tranche

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Uploaded on July 6, 2016