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