Помогите пожалуйста срочно!!!!!
Упростите выражения:

1) 84b+38b

2) 90n+71n

3) -3,2d-8,3d

4) -3,4a-5,1a

5) 32n-23m+2n+15n

6) 32m+17n-2m-11m

7) 34c+14m-m-6m

8) -3(8x+7)-7(-5x+3)

9) 9(8m+9)-6(-3m+8)

Помогите ооооочень срочно дам 25 балов





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