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11 Nov 2019
![](https://prealliance-textbook-qa.oneclass.com/qa_images/homework_help/question/qa_images/41/4174852.jpeg)
= 4[n(n + 1)/2]2 - 3 n(n + 1)/2 n(n + 1)[2n(n + 1) - 3]/2 n(n + 1)(2n2 + 2n - 3)
![](https://prealliance-textbook-qa.oneclass.com/qa_images/homework_help/question/qa_images/41/4174852.jpeg)
= 4[n(n + 1)/2]2 - 3 n(n + 1)/2 n(n + 1)[2n(n + 1) - 3]/2 n(n + 1)(2n2 + 2n - 3)
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Bunny GreenfelderLv2
17 Jun 2019