5. Add the following.
a) (5a² + 2) + (9ab - 2)
b) (4x?y2– 3xy + 16) + (8 - 11xy + 3x?y?)
c) (29p - 3qr) + (9rq - 7rp) + (pr-5pq)
d) (12x2- 25x - 9) + (6r2+ 13x) + (34 - 8x?)
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