Sederhana dari (p-3q-5r-4)-2 (p3q4r-2)-2

[tex] {( {p}^{ - 3} {q}^{ - 5} {r}^{ - 4} ) }^{ - 2} ( { {p}^{3} {q}^{4} {r}^{ - 2}) }^{ - 2} = ( {p}^{ - 6} {q}^{ - 10} {r}^{8} )( {p}^{ - 6} {q}^{ - 8} {r}^{4} ) = {p}^{ - 12} {q}^{ - 18} {r}^{12} = \frac{ {r}^{12} }{ {p}^{12} {q}^{18} } [/tex]