Factor
3mn\left(n^{2}+3\right)
Evaluate
3mn\left(n^{2}+3\right)
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3\left(mn^{3}+3mn\right)
Factor out 3.
mn\left(n^{2}+3\right)
Consider mn^{3}+3mn. Factor out mn.
3mn\left(n^{2}+3\right)
Rewrite the complete factored expression. Polynomial n^{2}+3 is not factored since it does not have any rational roots.
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