\(56=\textcircled{2} \times \textcircled{2} \times \textcircled{2} \times 7 \\
64=\textcircled{2} \times \textcircled{2} \times \textcircled{2} \times 2 \times 2 \times 2 \\ \Downarrow \\
GCF(56,64)=\textcircled{2} \times \textcircled{2} \times \textcircled{2}=8 \\ \\
56+64=8 \times 7+8 \times 8=8(7+8) \\ \\
\boxed{56+64=8(7+8)}\)
