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Mathematics, 07.10.2019 08:30 bri1334

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7. 9a - 3b

8. (-6m + n) + (-4m - 5n)

9. (9x2 + 5) + (-2x2 - 8) + (x2 - 3)

10. 4a + (9a+3)

11. 7b + (4b - 6)

12. 8d2 + (6d2 - 4d)

13. (5x2 + 4) + (-3x2 - 4)

14. [-4x + (10 - 5x)] + 5x

15. 8 + [5 + (6 + x)]

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7. 9a - 3b

8. (-6m + n) + (-4m - 5n)

9. (9x2 + 5) + (-2x2 -...
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