1)(m⁻⁴/n⁻⁵)⁻³ =m^12/n^152)(-4x⁻⁵y/ z³)³ =-64x^-15y³/z^9=-64y³/x^15z^9
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1)(m⁻⁴/n⁻⁵)⁻³ =m^12/n^15
2)(-4x⁻⁵y/ z³)³ =-64x^-15y³/z^9=-64y³/x^15z^9