The expression $\displaystyle \left(\frac{x^{-4} y^{1} z^{-4} }{(xy)^{4} z^{6}} \right)^{0}$ equals $x^ry^sz^t$
where $r$, the exponent of $x$, is:
and $s$, the exponent of $y$, is:
and finally $t$, the exponent of $z$, is:
[NOTE: Your answers cannot be algebraic expressions.]