$\"\"$

The expression is $\"\"$

$\"\"$ (Substitute x = – 3 and y = 8 in original expression) $\"\"$

Additive inverse of – 8 is 8.

To subtract – 8, add 8.

Now, the expression becomes $\"\"$

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

The simplified expression is – 11.