12×(a+b) 5*(8+a) (x+Y)*15 7*(x-9) a*(x-y)

Question

12×(a+b) 5*(8+a) (x+Y)*15 7*(x-9) a*(x-y)

Answer 1

Ответ:

.........,...........

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Answer 2

Ответ:

12а +12b

40 + 5a

15x+15y

6x - 63

ax - ay