[" 3.Add the following."],[[" (i) "ab-bc,bc-ca,ca-ab],[" (iii) "2p^(2)q^(2)-3pq+4,5+7pq-3p^(2)q^(2)," (iv) "l^(2)+m^(2),m^(2)+n^(2),n^(2)+l^(2)],[]]

Add the following. (i) ab-bc, bc-ca,ca-ab (ii) a-b+ab,b-c+bc,c-a+ac (iii) 2p^2q^2-3pq+4,5+7pq-3p^2q^2 (iv) l^2+m^2,m^2+n^2,n^2+l^2,2lm+2mn+2nl

Add the following.(i) ab-b,bc-ca,ca-ab (ii) a-b+ab,b-c-a+bc,c-a+ac( ii) a-b+abq+4,5+7pq-3p^(2)q^(2)( iv) l^(2)+m^(2),m^(2)+n^(2),n^(2)+l^(2),2lm+2mn+2nl

Add : 3p^(2)q^(2) - 4pq + 5, - 10p^(2) q^(2), 15 + 9pq + 7p^(2)q^(2)

Add the following: 2p^2q^2-3pq+4 , 5+7pq-3p^2q^2

Add : 6p^(2)q - 5pq^(2) -3pq, 8pq^(2)+2p^(2)q -2pq

Add : 6p^(2)q - 5pq^(2) -3pq, 8pq^(2)+2p^(2)q -2pq

Add the following expressions: 2ab+3bc-5ca, 4bc-3ab+7ca, 2ca-ab-5bc

Add the following: 2p^2q^2 - 3pq + 4, 5+ 7 pq - 3p^2 q^2