Answer
$H(z) = z^{-6}$
Work Step by Step
$H(z)=-6z^{-7}$
$\int H(z)dz = \int -6z^{-7}$
$H(z) = \frac{-6z^{-7+1}}{-7+1}$
$H(z) = \frac{-6z^{-6}}{-6}$
$H(z) = z^{-6}$
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