$$\frac{5}{2}$$  

$$\frac{3}{2}$$  

4

3

9

1

2

3

-1

-2

$$-\frac{5}{3}$$  

$$-\frac{3}{5}$$  

$$\frac{3}{5}$$  

$$\frac{5}{3}$$  

2

$$\left\{-3,-2,-1,1\right\}$$  

$$\left\{-3,-1,1\right\}$$  

$$\left\{-3,-2,-1\right\}$$  

$$\left\{-3,-2,1\right\}$$  

$$\left\{-2,-1,1\right\}$$  

$$\left\{-1,1,2\right\}$$  

$$\left\{-1,1\right\}$$  

$$\left\{-1,2\right\}$$  

$$\left\{1,2\right\}$$  

$$\left\{2\right\}$$  

$$\left\{4,8\right\}$$  

$$\left\{-4,-8\right\}$$  

$$\left\{2,3\right\}$$  

$$\left\{-2,-3\right\}$$  

$$\left\{3,8\right\}$$  

$$-2$$  

$$-3$$  

5

7

13