Помогите плиз!!!!!!!!!!

Question

Помогите плиз!!!!!!!!!!

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Answer 1

4⁻¹*8²(а⁻³)³:(8а⁻³)²=2⁻²*(2³)²*а⁻⁹:(2³)²*а⁻⁶=2⁽⁻²⁺⁶⁻⁶⁾*а⁽⁻⁹⁺⁶⁾=2⁻²а⁻³=а⁻³/4=0,25а⁻³