Evaluate
2\pi \approx 6.283185307
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\frac{\pi +7\pi }{4}
Since \frac{\pi }{4} and \frac{7\pi }{4} have the same denominator, add them by adding their numerators.
\frac{8\pi }{4}
Combine like terms in \pi +7\pi .
2\pi
Divide 8\pi by 4 to get 2\pi .
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