what is (3n+3)! factorial expanded out?

(3n+3)!

=3n!*(3n+1)*(3n+2)*(3n+3)       Just like Geno said 

=1*2*3*....*(3n)*(3n+1)*(3n+2)*(3n+3)

(3n + 3)!  =  (3n + 3)·(3n + 2)·(3n+1)·(3n)!