(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

(1x2x6) + (2x3x7) + ... + n(n + 1)(n + 5)

2. Relevant equations

Find an expression for the sum of the series. Give your answer as a product of linear factors in n.

3. The attempt at a solution

I haven't tried it since I don't know what to do.

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# Find an expression for the sum of the series

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