Expand
16x^{2}+8xy+8x+y^{2}+2y+1
Evaluate
\left(4x+y+1\right)^{2}
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16x^{2}+8xy+8x+y^{2}+2y+1
Square 4x+y+1.
16x^{2}+8xy+8x+y^{2}+2y+1
Square 4x+y+1.
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