Evaluate
\left(4+y-y^{2}\right)^{2}
Expand
y^{4}-2y^{3}-7y^{2}+8y+16
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y^{4}-2y^{3}-7y^{2}+8y+16
Square y-y^{2}+4.
y^{4}-2y^{3}-7y^{2}+8y+16
Square y-y^{2}+4.
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