Evaluate
\left(-y+a-8\right)^{2}
Expand
y^{2}-2ay+16y+a^{2}-16a+64
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y^{2}-2ay+16y+a^{2}-16a+64
Square a-y-8.
y^{2}-2ay+16y+a^{2}-16a+64
Square a-y-8.
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