. The sum of 3p?q? - 5pq + 4 and 7 + 7pq - 2p?q?
is equal to
(A) p2q2 - 2pq + 11 (B) - p-q2 + 2q +11
(C) - p2q2 - 2pq + 11 (D) p-q2 + 2pq + 11. (1)
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