$\"\"$

The given expression is $\"\"$ .

Subtract the polynomials horizontally.

$\"\"$ (Multiply the second polynomial with negative sign)

$\"\"$ (Apply commutative property of addition: $\"\"$ )

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

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

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

$\"\"$ (Apply additive identity property: $\"\"$ ) $\"\"$

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