What is the factored form of x12y18+1
(x4y6-1)(x8y12-x4y6+1)
(x4y6+1)(x8y12-x4y6+1)
(x4y6-1)(x8y12+x4y6-1)
(x4y6+1)(x4y6+1)(x4y6+1)