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(((a - 1)+b+c+d+e)! / ((a - 1)! b! c! d! e!)) + ((a+(b-1)+c+d+e)! / (a! (b-1)! c! d! e!)) + ((a+b+(c-1)+d+e)! / (a! b! (c-1)! d! e!))
(((a - 1)+b+c+d+e)! / ((a - 1)! b! c! d! e!)) + ((a+(b-1)+c+d+e)! / (a! (b-1)! c! d! e!)) + ((a+b+(c-1)+d+e)! / (a! b! (c-1)! d! e!))
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