c.
2pgr - 7p+qr + 4pq+r, -3p_qr + 9pqr – 2pr,
6pr - 9pqr
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Answer:
qpqpqqpqpqppqppqpqpqpqp
Step-by-step explanation:
qpqpqqpqpqppqppqpqpqpqp
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