Question: Given that k=1 to n k 3 = n 2 (n+1) 2 /4, evaluate j=2 to n (j-1) 3 by the change of summation index

Given that k=1 to n k3 = n2(n+1)2/4, evaluate j=2 to n (j-1)3 by the change of summation index k = j-1.

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