sum of infinite series

anas strepera strepera B. M. A. Basilicata Reg. Charly-sur-Marne clearer's solvent conscript from digiproside dilute sulfuric acid double check valve equicrure free-settling ratio glass wool felt hearth trimmer helminthosporium hordei bub'ak leishmanial stage long span pwsa separation negatives shelbies Verpa conica