3^-5°3^-7/3^-15 плиз помогите

Question

3^-5°3^-7/3^-15 плиз помогите

Answer 1

3⁻⁵   3⁻⁷ : 3⁻¹⁵ = 3⁽⁻⁵⁻⁷) : 3⁻¹⁵ = 3⁻¹² : 3⁻¹⁵ = 1/3⁻³ = 3³ = 27