Question

Welp, Need some major help with this one, the equation looks like this, http://puu.sh/8Kn1R.png
and I just don't know how to do it ;/

Answer 1

\[\frac{x^4 x^8 y^{12} \left(\frac{1}{z^5}\right)^9}{(x y)^7}=\frac{x^{12} y^{12}}{z^{45} \left(x^7 y^7\right)}=\frac{x^5 y^5}{z^{45}} \]