178.
1) $$(3 \cdot 5)^4 = 3^4 \cdot 5^4 = 81 \cdot 625 = 50625$$
179.
1) $$(ax)^4 = a^4 x^4$$
2) $$(7 \cdot 6)^5 = 7^5 \cdot 6^5 = 16807 \cdot 7776 = 130635432$$
3) $$(1,3 \cdot 8)^5 = (\frac{13}{10} \cdot 8)^5 = (\frac{104}{10})^5 = (\frac{52}{5})^5 = \frac{52^5}{5^5} = \frac{380204032}{3125} = 121665287.04$$
4) $$(4 \cdot \frac{1}{7})^3 = 4^3 \cdot (\frac{1}{7})^3 = 64 \cdot \frac{1}{343} = \frac{64}{343} \approx 0.1866$$