Use the binomial theorem or Pascal's triangle to expand the following binomial: (10 points)?

x^6 + 6*x^5*(2y)^1 + 6*5/2!*x^4*(2y)^2 + 6*5*4/3!*x^3*(2y)^3 + 6*5*4*3/4!*x^2*(2y)^4 + 6*5*4*3*2/5!*x^1*(2y)^5