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To solve \( 3^{-2} - \left(-\frac{1}{4}\right)^{-3} \), let's break it down. First, \( 3^{-2} = \frac{1}{3^2} = \frac{1}{9} \). Now, for \( \left(-\frac{1}{4}\right)^{-3} \), we have \( \left(-\frac{1}{4}\right)^{-3} = -\frac{1}{\left(\frac{1}{4}\right)^3} = -\frac{1}{\frac{1}{64}} = -64 \). Putting it all together: \[ 3^{-2} - \left(-\frac{1}{4}\right)^{-3} = \frac{1}{9} + 64 = \frac{1}{9} + \frac{576}{9} = \frac{577}{9}. \] Thus, the final answer is \( \frac{577}{9} \).