Write the absolute value of $a+4,$ if $a$ is greater than $-4$.

Write the absolute value of $a+4,$ if $a$ is less than $-4$.

Write the absolute value of $|-3|$.

Write the absolute value of 

$-\left|-5\right|$

Write the absolute value of 

$|12-5|$

The smallest integer is zero.

The opposite of zero is zero.