Question

Раскройте скобки 1)a+(b+c-d)-(c-f) 2)a-(-b-c)-d+(c+f)

Answer 1

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

Answer 2

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