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b. (4p + p) + (5q - 2q) + (-8r - 3r) = 5p + 3q - 11r
c. 5x² - 4x - 2
5x² - 6x + 8
-------------------- -
2x - 10
d. (7y - (-5y)) + (7 - 10)
12y - 3
e. 12pq - 15qr
f. 2q + 2r