$rac{3^{-7} imes 2^{-9}}{2^{-7} imes 3^{5}} =$

$rac{3^{-4} imes 2^{12} imes 5^{-19}}{3^{17} imes 5^{2} imes 2^{-9}} =$

$rac{(0.5)^{-6} imes 4^{3}}{2^{17} imes 0.25} =$