$\"\"$

The expression is $\"\"$

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

According definition of absolute value:

If a is a negative number, then $\"\"$ .

$\"\"$

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

$\"\"$ (Apply Additive inverse property: $\"\"$ ) $\"\"$

The value of the expression is $\"\"$ .