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16\left(ab\right)^{4}
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16\left(ab\right)^{4}
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\left(-2\right)^{4}a^{4}b^{4}
Expand \left(-2ab\right)^{4}.
16a^{4}b^{4}
Calculate -2 to the power of 4 and get 16.
\left(-2\right)^{4}a^{4}b^{4}
Expand \left(-2ab\right)^{4}.
16a^{4}b^{4}
Calculate -2 to the power of 4 and get 16.
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