[k(k+1)(k+2)(k+3) + 4(k+1)(k+2)(k+3)]/4(adsbygoogle = window.adsbygoogle || []).push({});

Please, factor this out....

What's the common factor? How did you get there? (ok i hope it doesnt require expanding the polynomials :p)

would it be easier if i substituted every (k+x) by a different variable, where (k+1) would equal to variable 'A', (k+2) = B, and so forth?

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# Mathematical induction/factoring

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