ini pakai cara ya, makasih:)

[tex] \frac{ {(x {y}^{3}) }^{ - 1} }{ {( {x}^{ - 1} {y}^{2} )}^{3} } = \frac{ {x }^{ - 1} {y}^{ - 3} }{ {x}^{ - 3} {y}^{6} } [/tex]
[tex] = {x}^{( - 1) - ( - 3) {y}^{( - 3) - 6} } [/tex]
[tex] = {x}^{2} {y}^{ - 9} [/tex]