Jawab:
[1.]  = 3³
[2]  = 10⁸
[3]  = a¹²

Penjelasan dengan langkah-langkah:
Operasi hitung pangkat / eksponen:
---->   nᵃ×nᵇ = nᵃ÷n⁻ᵇ = nᵃ⁺ᵇ
---->   nᵃ×n⁻ᵇ = nᵃ÷nᵇ = nᵃ⁻ᵇ
---->   (nᵃ)ᵇ = nᵃ⁽ᵇ⁾ = nᵇ⁽ᵃ⁾ (komutatif)
---->  
---->   aⁿ×bⁿ = (a×b)ⁿ
---->   aⁿ÷bⁿ = (a÷b)ⁿ
_______________
[1.]  (3⁵×3⁶) ÷ 3⁸ =
3⁵⁺⁶⁻⁸ = 3¹¹⁻⁸ = 3³
_____________________________
[2]  ((4⁵×5⁶) ÷ (4⁴×5⁴))⁴ = 4⁽⁵⁻⁴⁾⁴ × 5⁽⁶⁻⁴⁾⁴
= 4⁽¹⁾⁴ × 5⁽²⁾⁴ = 2²⁽¹⁾⁴ × 5⁽²⁾⁴ = 2⁸×5⁸ = (2×5)⁸ = 10⁸
_______________
[3]  ((a²×a³)³ ÷ a¹²)⁴ =
a⁽⁽²⁺³⁾³ ⁻ ¹²⁾⁴ = a⁽⁽⁵⁾³ ⁻ ¹²⁾⁴ = a⁽¹⁵ ⁻ ¹²⁾⁴ = a³⁽⁴⁾ = a¹²

(Xcvi)