Примените распределительный закон умножения:

а)

4×(m-3)
(a+b)×9
5×(1+k+n)

б)

(k+5)×y
7(m-n)
(a+b+1)×c

в)

n×(1-x)
(b+c)×d
(m+3+n)×8

г)

a(b+2)
2(a+2)
b(a+1)​
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