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Reduce each fraction.

$\dfrac{x^2-x-6}{x^2-9}$
$\quad \displaystyle\frac{x+6}{9}$

$\quad \displaystyle\frac{x+2}{x+3}$

$\quad \displaystyle\frac{x-2}{x-3}$

$\dfrac{16t^2-4}{8t+4}$
$\quad 2t-1$

$\quad \displaystyle\frac{t-2}{2}$

$\quad3t^2$

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