Question

1) a-7: a³; ??????????

Answer 1

a-7 : a³ = (a⁻⁷) / (a³)

a⁻⁷ / a³ = a⁻⁷-³ = a⁻¹⁰

So, a-7 : a³ simplifies to a⁻¹⁰.