$\"\"$

The given expression is $\"\"$ .

Subtract the polynomials horizontally

$\"\"$ (Multiply the second polynomial with negative sign) $\"\"$ (Apply commutative property: $\"\"$ )

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

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

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