#### Answer

$\frac{t^{7}}{u^{11}}$

#### Work Step by Step

Recall, anything raised to the zeroth power is 1. Thus, this expression simplifies to:
$t^{7}u^{-11}$
Recall the equation: $a^{-n}= \frac{1}{a^{n}}$. Thus, we simplify this expression:
$\frac{t^{7}}{u^{11}}$