Look for pairs of positive and negative integers that will add to zero.

This will be easier if you line up the symbols, as below.

$\array{{\enclose{circle}{+++\\---}}++}$

Write an expression representing the integers that added to zero, plus the remaining integers.

$0+0+0+1+1$

One solution to this problem is $0+0+0+1+1=2$.
You can also write this as $5+(-3)=2$.

Where does the arrow begin? Where does it end? How long is the arrow?

$4-6=-2$ or $4+(-6)=-2$

How many $+$'s are there? How many $-$'s? How many zeros? When you eliminate the zeros, what is left over?