Ответ:
1) 3*а-6b+9c
2) a-2b-a+5
3) 3c+12+7-3c
4) 8-2a+8b-8
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Answers & Comments
Ответ:
1) 3*а-6b+9c
2) a-2b-a+5
3) 3c+12+7-3c
4) 8-2a+8b-8