How do you simplify $(n+4)(n+5)(n+3)!$ ?

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Answer 1 · 2016-11-15T14:21:11

$:. (n+4)(n+5)(n+3)! = (n+5)!$

$(n+4)(n+5)(n+3)! = (n+4)(n+5)(n+3)(n+2)(n+1)(n)(n-1)...1$

$:. (n+4)(n+5)(n+3)! = (n+5)(n+4)(n+3)(n+2)(n+1)(n)(n-1)...1$

$:. (n+4)(n+5)(n+3)! = (n+5)!$

How do you simplify (n+4)(n+5)(n+3)!(n+4)(n+5)(n+3)!?