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= -a -b
B. 2x + 3 (y - x) = 2x + 3y - 3x
= 2x - 3x + 3y
= -x + 3y
C. 3p - 5 (-p + k) = 3p + 5p - 5k
= 8p - 5k
D. 2a - 4 (a - b) h =
E. 3x - 2y + 2x + 2y = 3x + 2x - 2y + 2y
= 5x - y
F. 12x² - 8y² + 3x² - y² = 12x² + 3x² - 8y² - y²
= 15x² - 9y²
G. 3p² + 2p - k + l =
H. - 4 (a + b) - 3 (2a +b) = - 4a - 4b - 6a - 3b
= - 4a - 6a - 4b - 3b
= - 10a - 7b