Ответ:
1)
5^3 × 5^12/5^12
5^15/5^12
5^3
125
2) 7(3х - y) - 5(x+y)
21x - 7y - 5x - 5y
16x - 12y
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Ответ:
1)
5^3 × 5^12/5^12
5^15/5^12
5^3
125
2) 7(3х - y) - 5(x+y)
21x - 7y - 5x - 5y
16x - 12y