1. (4 балла) Вычислите:

1) $$6^3 + 3b = 216 + 3b$$
2) $$7^{2 \text{log}_7 3} = 7^{\text{log}_7 3^2} = 9$$
3) $$4 √{81} ∛{625} = 4 √{3^4} ∛{5^4} = 4 · 3 · 5 = 60$$
4) $$3 \text{arctg} √{3} - 8 \text{arccos} \frac{√{2}}{2} = 3 · \frac{π}{3} - 8 · \frac{π}{4} = π - 2π = -π$$