Factor
81\left(4-\pi \right)x^{2}
Evaluate
81\left(4-\pi \right)x^{2}
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81\left(4x^{2}-\pi x^{2}\right)
Factor out 81.
x^{2}\left(4-\pi \right)
Consider 4x^{2}-\pi x^{2}. Factor out x^{2}.
81x^{2}\left(4-\pi \right)
Rewrite the complete factored expression.
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