Using the rule of exponents that states $a^{m}/a^{n}=a^{m-n}$, we get:
$$
\frac{x^{3}}{x^{-3}}=x^{3-(-3)}=x^{6}
$$
$$
\frac{y^{4}}{y^{-4}}=y^{4-(-4)}=y^{8}
$$
$$
\frac{z^{5}}{z^{-5}}=z^{5-(-5)}=z^{10}
$$
So, the expression inside the brackets simplifies to
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