What is the degree of the polynomial $a^2+b^2+c^2+3abc$?

Complete the table.

Here is a magic square:

Clues:   $\mathrm{A}=1$ is added to the number

             $\mathrm{B}=2$ is added to the number

             $\mathrm{C}=3$ is subtracted from the number

             $\mathrm{D}=4$ is subtracted from the number

             $\mathrm{E}=$ Let the number be $x$.

             $\mathrm{F}=4$ is added to the number

             $\mathrm{G}=3$ is added to the number

             $\mathrm{H}=2$ is subtracted from the number

               $\mathrm{I}=1$ is subtracted from the number

Make your own square magic using the number $x$. Write the magic number for the magic square. Put the value in the number $x$ in such a way that no cell has zero or negative number. Find the numerical magic square and write the magic number.