Evalute each of the following:
(i) 
+ 
(ii) 
(iii) 
(iv) 
(v) 
(vi) 
(vii) 
(viii) 
(ix) 
(x) 
(xi) 
- 
(i) 
- 
= 
= 
= 
(ii) 
+ 
= 
= 
= 
(iii) 
- 
= 
= 
= 
(iv) -2 - 
= 
= 
= 
(v) 
+ 
= 
= 
= 
(vi) 
+ 
= 
= 
= 
(vii) 
+ 
= 
= 
= 
(viii) 
- 
= 
= 
= 
(ix) 
+ 
= 
= 
= 
(x) 
- 
= 
= 
= 
(xi) 
+
= 
= 
= 
2