Respuesta :

a^8/b^12 since the exponent multiplies inside

(a²/b³)⁴
= (a²/b³)(a²/b³)(a²/b³)(a²/b³)
= (a² · a² · a² · a²)/(b³ · b³ · b³ · b³)
= x^8 / y^12