Factor
\frac{\left(\frac{1}{6}\right)^{x}-9}{36}
Evaluate
\frac{\left(\frac{1}{6}\right)^{x}}{36}-\frac{1}{4}
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\frac{4\times \left(\frac{1}{6}\right)^{2+x}-1}{4}
Factor out \frac{1}{4}.
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