Answer
$-13z^{4}$
Work Step by Step
We are given the expression $-\frac{26z^{11}}{2z^{7}}$.
We can simplify this expression by using the quotient rule, which holds that $\frac{a^{m}}{a^{n}}=a^{m-n}$ (where a is a nonzero real number, and m and n are integers).
$-\frac{26z^{11}}{2z^{7}}=(-\frac{26}{2})\times(z^{11-7})=-13z^{4}$