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The above series go in the following sequence. 5 × 2 – 1 = 9 9 × 3 + 3 = 30 30 × 4 – 5 = 115 115 × 5 + 7 = 582 582 × 6 – 9 = 3483 Hence, the resulting series would be: 15   2990  355 178210683
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