⁴√81 ⁴√3⁴ 3
---------- = ---------- = ----------
⁴√625 ⁴√5⁴ 5
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2 3 1 27 1 53 5
(-------)⁻³ - 4⁻²= (-------)³ - --------- = -------- - -------- = ---------- = 3 ------
3 2 16 8 16 16 16
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9⁻²*27²/₃ = 3⁻⁴ * (3³)²/₃= (1/3⁴) *3²= 1/3² =1/9
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16⁻⁰⁾¹²⁵ * 8⁵/₆ *4²⁾⁵ = (2⁴)⁻⁰⁾¹²⁵ * (2³)⁵/₆ *(2²)²⁾⁵ =2⁻⁰⁾⁵ *2⁵/₂ *2⁵ =2⁻⁰⁾⁵⁺²⁾⁵⁺⁵=2⁷=128