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Cornel Ioan Vălean

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More (Almost) Impossible Integrals, Sums, and Series A New Collection of Fiendish Problems and Surprising Solutions
More (Almost) Impossible Integrals, Sums, and Series A New Collection of Fiendish Problems and Surprising Solutions
(Almost) Impossible Integrals, Sums, and Series
More (Almost) Impossible Integrals, Sums, and Series
(Almost) Impossible Integrals, Sums, and Series