mk⁻⁶ / (7n)⁵ : (m⁻³ / 49nk²)³ =
= mk⁻⁶ / (7n)⁵ : m⁻⁹ / 49³n³k⁶ =
= mk⁻⁶ / (7n)⁵ * 49³n³k⁶ / m⁻⁹ =
= mk⁻⁶ / 7⁵n⁵ * 7⁶n³k⁶ / m⁻⁹ =
= mk⁻⁶ / 7⁵n⁵ * 7⁶n³k⁶ / m⁻⁹ =
= (7⁶mk⁻⁶⁺⁶n³) / (7⁵n⁵m⁻⁹) =
= (7⁶mk⁰n³) / (7⁵n⁵m⁻⁹) =
= 7¹m¹⁺⁹n³⁻⁵ =
= 7m¹⁰n⁻² или 7m¹⁰/n².