1) 9•9•9•а•а•а=729*a^3
2) x•x•x•3•3=9*x^3
3) x/y•x/y•x/y(x-y)•(x-y)=(x-y)^2*(x/y)^3=
4) a/b•a/b•(8a-b)•(8a-b)•(8a-b)=(a/b)^2*(8a-b)^3
1) 9•9•9•а•а•а=729*a^3
2) x•x•x•3•3=9*x^3
3) x/y•x/y•x/y(x-y)•(x-y)=(x-y)^2*(x/y)^3=
4) a/b•a/b•(8a-b)•(8a-b)•(8a-b)=(a/b)^2*(8a-b)^3