Evaluate
\left(r^{2}+r+1\right)^{2}
Expand
r^{4}+2r^{3}+3r^{2}+2r+1
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r^{4}+2r^{3}+3r^{2}+2r+1
Square 1+r+r^{2}.
r^{4}+2r^{3}+3r^{2}+2r+1
Square 1+r+r^{2}.
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