Answer:
1- 3x, 2- 5x+1, 4- 16x, 5- 10x+7, 7- 5x+7, 8- 13x+6, 10- 8x+2y, 11- 2x+6y+3
Explanation:
1. 3x
2. 5x+1
4. 16x
5. 10x+6
10. 8x +2y
11. 2x+6y+3
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