Ответ:
1)8/9(k+1)
8/9k+9
2)48m/60n(2m-n)^2
4m/5n(2m-n)^2
3)4×(-1)/5(a-b)
-4/5a-5b
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Ответ:
1)8/9(k+1)
8/9k+9
2)48m/60n(2m-n)^2
4m/5n(2m-n)^2
3)4×(-1)/5(a-b)
-4/5a-5b