5x+3y

(a)  

6b+b-5c

(a)  

x+x+x+3y-2z

(a)  

7xy+3xy

(a)  

9g-6g

(a)  

5y+3y-4x-3x

(a)  

3a-3a

(a)  

15g-4h+10h-4g

(a)  

-13w+4p-2w-8p

(a)  

2p-3p

(a)  

xyz-3xyz

(a)  

14e-2ef

(a)  

-3m+10n-10n

(a)  

-5s-5t-4t+3q

(a)  

10gb-13bg

(a)  

4c-4d+5f

(a)  

10+3-7y

(a)  

12-3m-12

(a)  

13mnp+2npm

(a)