$$=\frac{a^{2x+2y}xa^{2}y+2z}{a^{4x+4y+4z}\times a^{2x+2x}$$
$a^{4\left(-2x-y-z\right)}\left(xya^{2\left(x+y+1\right)}+2z\right)$
$a^{4\left(-2x-y-z\right)}\left(-6xy\ln(a)a^{2\left(x+y+1\right)}+ya^{2\left(x+y+1\right)}-16z\ln(a)\right)$
