Express the matrix `[{:(2 ,1),(3,4):}]` as the sum of a symmetric and a skew-symmetric matrix.

Explanation

To express the matrix \( A = \begin{pmatrix} 2 & 1 \\ 3 & 4 \end{pmatrix} \) as the sum of a symmetric matrix and a skew-symmetric matrix, we can follow these steps:

### Step 1: Define the matrix A
Let
\[ A = \begin{pmatrix} 2 & 1 \\ 3 & 4 \end{pmatrix} \]

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