$\"\"$

The given expression is $\"\"$ .

Add the polynomials vertically.

$\"\"$ (Arrange like terms in columns and combine them)

The sum of polynomials is $\"\"$ .

$\"\"$

$\"\"$ (Substitute $\"\"$ )

$\"\"$ (Multiply: $\"\"$ )

$\"\"$ (Subtract: $\"\"$ ) $\"\"$

The value of sum is $\"\"$ .