Помогите раскрыть...

Question

Помогите раскрыть скобки:

1)a+(-b-c-d-c-f)=

2)a-(b-c+d-c+f)=

3)a-(-b+c-d+c-f)=

4)a+(b-c+d-c+f)=

5)a+(b+c-d+c+f)=

Answer 1

1)a-b-2c-d-f

2)a-b+c-d+c-f=a-b+2c-d-f

3)a+b-c+d-c+f=a+b-2c+d+f

4)a+b-c+d-c+f=a+b-2c+d+f

5)a+b+c-d+c+f=a+b+2c-d+f

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