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(=) -4x - 10x + 5y + y
(=) -14x + 6y
(5x + 7) - 3(2x - 5)
(=) (5x + 7) - (6x - 15)
(=) 5x + 7 - 6x + 15
(=) 5x - 6x + 7 + 15
(=) -x + 22
8x - 2(-4x + 7)
(=) 8x - (-8x + 14)
(=) 8x + 8x - 14
(=) 16x - 14
-3(2x - 5) + (-x + 4)
(=) -(6x - 15) + (-x + 4)
(=) -6x + 15 - x + 4
(=) -6x - x + 15 + 4
(=) -7x + 19
2x² - 3x + 5 - 3x² + x - 9
(=) 2x² - 3x² - 3x + x + 5 - 9
(=) -x² - 2x - 4