F67⁡(a,12⁢a+1,b,c,d,f,-n12⁢a,a-b+1,a-c+1,a-d+1,a-f+1,a+n+1;1)=(a+1)n⁢(a-b-c+1)n⁢(a-b-d+1)n⁢(a-c-d+1)n(a-b+1)n⁢(a-c+1)n⁢(a-d+1)n⁢(a-b-c-d+1)n,