Integral (x - 2/x)^2 dx =

[tex]in \: {(x - \frac{2}{x} )}^{2} dx \\ = in \: ( {x}^{2} - 4 + \frac{4}{ {x}^{2} } )dx \\ = \frac{2}{3} {x}^{3} - 4x - \frac{4}{x} + c[/tex]