661
1) а+(b-c)
2) x-(y+2)
3) m-(-n-k)

4) 9-(a+b+c)
5) x-(-3+y-z)
6) m+(8+n-k)

7) a-(b-c+d)
8) x+(y-z+8)
9) m-(-2+n+k)
Раскройте скобки.
пожаааааааааааалста помогите​
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