Factor
yx^{2}\left(-2\sqrt{21}x^{2}-8x^{2}+3y\right)
Evaluate
yx^{2}\left(-2\sqrt{21}x^{2}-8x^{2}+3y\right)
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x^{2}y\left(-15x^{2}+3y+7x^{2}-2\sqrt{21}x^{2}\right)
Factor out x^{2}y.
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