Question

7-{-3+2+2[-5-2+(1-3-4)]+7}-1

Answer 1

$7-[-3+2+2[-5-2+(1-3-4)]+7]-1$
$7-[-3+2+2[-5-2+(1-7)]+7]-1$
$7-[-3+2+2[-5-2+(-6)]+7]-1$
$7-[-3+2+2[-5-2-6]+7]-1$
$7-[-3+2+2[-13]+7]-1$
$7-[-3+2-26+7]-1$
$7-[+2-29+7]-1$
$7-[-29+9]-1$
$7-[-20]-1$
$7+20-1$
$26$