$\"\"$

The matrix operation is $\"\"$ .

$\"\"$ (Original matrix)

$\"\"$

$\"\"$ (Simplify)

$\"\"$ (Add: $\"\"$ )

$\"\"$ (Product of two same signs is positive)

$\"\"$ (Simplify)

Therefore, the simplified matrix is $\"\"$ . $\"\"$

The result of operation is $\"\"$ .