\(\frac{(0.2)^{3}+(0.3)^{3}+(0.5)^{3}-3 \times 0.2 \times 0.3 \times 0.5}{(0.2)^{2}+(0.3)^{2}+(0.5)^{2}-0.2 \times 0.3-0.2 \times 0.5-0.3 \times 0.5}\) is equal to -