1.(2×x^3n)×(2×x^n)^3+2×x^6n
2.(-2×x×y^2)^2n+1×(2×x^2×y)^2n+2
1 :18x^6n
2 :(2^2n)×(x^2n)×(y^2n)×[y^2n+4×x^(2n+2)