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  Viete's Formula

  Price2,00$
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  Lord Brouncker's Formula

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  Spiral Pi

  Price2,00$
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  Ten Thousand Digits of Pi

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  Ramanujan's Formula

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  Leibniz Formula

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  Euler's Formula

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  Wallis Formula

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  Bailey-Borwein-Plouffe Formula

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  Gregory and Leibniz Formula

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  Abraham Sharp's Formula

  Price2,00$