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(8a + 5a)(5b - 3b)
13a + 2b (D)
2. -6x² - 7x + 11x² + 8x
-6x² + 11x² + 8x - 7x
5x² + x (A)
3. (7x - 3y)(6x - 8y)
(7x - 6x)(-8y + 3y)
x - (-5y)
x + 5y
4. (-6x² + 10x + 1) - (-9x² + 9x - 4)
-6x² + 9x² + 10x - 9x + 1 + 4
3x² + x + 5 (C)
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