Factor
\frac{32\left(\frac{\pi a^{2}}{4}±2\right)-\pi a^{2}}{32}
Evaluate
\frac{\pi a^{2}}{4}±2-\frac{\pi a^{2}}{32}
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\frac{32\left(\left(\frac{a}{2}\right)^{2}\pi ±2\right)-a^{2}\pi }{32}
Factor out \frac{1}{32}.
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