Evaluate
\left(7y-2\right)^{4}
Expand
2401y^{4}-2744y^{3}+1176y^{2}-224y+16
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2401y^{4}-2744y^{3}+1176y^{2}-224y+16
Square 4+49y^{2}-28y.
2401y^{4}-2744y^{3}+1176y^{2}-224y+16
Square 4+49y^{2}-28y.
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