§ Задание 56
\[\boxed{\mathbf{4.}\mathbf{56}}\]
\[2 \rightarrow - 2\]
\[3 \rightarrow - 3\]
\[4 \rightarrow - 4\]
\[5 \rightarrow - 5\]
\[\boxed{\mathbf{4.}\mathbf{56}}\]
\[2 \rightarrow - 2\]
\[3 \rightarrow - 3\]
\[4 \rightarrow - 4\]
\[5 \rightarrow - 5\]