(x-1/xy)^3 factorize the following

We havex-1xy3Using : a-b3=a3-3a2b+3ab2-b3  , we get=x3-3x21xy+3x1xy2-1xy3=x3-3xy+3xy2-1x3y3
Note : It  was already in factored form .It can only be expanded now which is done above.

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