I have the expression $(k+1)! - 1 + (k+1)(k+1)!$
How do I factor out $(k+1)!$ to achieve the result: $[(k+1)!(k+2)] - 1$?
I for the life of me cannot figure this out. Thanks!
2026-04-03 21:19:56.1775251196
Factor out factorial from expression
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