Factor
\frac{4\pi r^{3}+9}{3}
Evaluate
\frac{4\pi r^{3}}{3}+3
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\frac{4\pi r^{3}+9}{3}
Factor out \frac{1}{3}. Polynomial 4\pi r^{3}+9 is not factored since it does not have any rational roots.
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