Answer
$\frac{t^2}{9}$
Work Step by Step
The given expression is
$=(\frac{-t}{3})^{2}$
Use $(\frac{a}{b})^{n}=\frac{a^n}{b^n}$.
$=\frac{(-t)^{2}}{3^{2}}$
Use $3^2=9$.
$=\frac{t^2}{9}$.
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