Expand
m^{2}+4mn-14m+4n^{2}-28n+49
Evaluate
\left(m+2n-7\right)^{2}
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m^{2}+4mn-14m+4n^{2}-28n+49
Square m+2n-7.
m^{2}+4mn-14m+4n^{2}-28n+49
Square m+2n-7.
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