$0$ is an integer. 

$0$ is neither positive nor negative. 

$-\left(-12\right)=-12$ 

On the number line $-11$ lies to the right of $-5$.

The construction dates of significant landmarks are given below. $AD$ is represented by positive integers and $BC$ by negative integers.

Write the following differences in ascending order.

$\left(A-D\right), \left(C-B\right), \left(D-E\right), \left(C-D\right), \left(A-E\right)$