Вычислите: (0,5)^20*2^21+3^7*5^7:15^6.

\[(0,5)^{20} \cdot 2^{21} + 3^{7} \cdot 5^{7}:15^{6} =\]

\[= \left( \frac{1}{2} \right)^{20} \cdot \left( \frac{2}{1} \right)^{21} + \frac{(5 \cdot 3)^{7}}{15^{6}} =\]

\[= 2 + 15 = 17\]