Question: “... My attempt: P = (n^2-1)n^2(n^2+1)=n(n-1)(n+1)[n(n^2+1)]”. Answer (from a >80K user!): “Hint: Write your product in the form (n-1)n(n+1)n(n^2+1).” – What am I missing here?

[ SmokeDetector | MS ] No whitespace in title (61): Owvwosveihwoqbwpabao ✏️ by Erwin Schrodinger on math.SE

D1, D2, D3.

D4, D5, D6.

D10, D11, D12.

D13, D14, D15.

C1, C2, C3.

C4, C5, C6.

C7, C8, C9.

Here’s a beaut math.stackexchange.com/q/3357990/29335