please tolong jawab soal perpangkatan

a) (3/4)⁻² = (4/3)² = 16/9

b) (-1/5)⁻¹² = (-5)¹² = 5¹²

c) (10/11)⁻⁴ = (11/10)⁴

d) (-6/7)⁻²⁵ = (-7/6)²⁵

semoga jelas dan membantu ya