$\"\"$

The expression is $\"\"$ .

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

$\"\"$ (Product of two different signs is negative)

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

$\"\"$ (Absolute value of $\"\"$ )

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

The simplified expression value is $\"\"$ 4.