This problem provides more illustrations of the use of parentheses.
Evaluate the expression
$3 - 5 - 4 - 8$ =

Evaluate the expression
$3 - (5 - 4) - 8$ =

Evaluate the expression
$3 - (5 - 4 - 8)$ =

Evaluate the expression
$3 - (5 - (4 - 8))$ =