4) 60m⁶n⁵/17p⁴ : (15m⁸n¹⁰);

4) $$\frac{60m^6n^5}{17p^4} : (15m^8n^{10}) = \frac{60m^6n^5}{17p^4} \cdot \frac{1}{15m^8n^{10}} = \frac{60m^6n^5}{17 \cdot 15m^8n^{10}p^4} = \frac{4}{17m^{8-6}n^{10-5}p^4} = \frac{4}{17m^2n^5p^4}$$

Ответ: 4/(17m²n⁵p⁴)