Simplify: (x1/2y3/4)4(x^{1/2} y^{3/4})^4(x1/2y3/4)4
x2y3x^2y^3x2y3
x4.5y7x^{4.5}y^{7}x4.5y7
x1/8y3/16x^{1/8}y^{3/16}x1/8y3/16
xy3xy^3xy3