-2 w + 5 z - 5

-14 w + 13 z + 9

-2 w + 5 z + 5

14 w - 13 z - 5

5 n + 4 m

(5 + m ) + ( 4 + n )

5 m + 4 n

5 m - 4 n

8

12

14

16

-16 b - 6

-16 b + 6

-10 b + 6

16 b - 6

3 n + 21

3 + n + 7

4 n + 7

n + 12

8 x + 4 x² - 12 x

2 x + 4 x² - x

6 x + x² - 12 x

4 x + 4 x² - x

30

300

3

3000

36

19

27

10

20

15

11

10