4. Calculate $$\sqrt{64} + (\sqrt{64})^2$$.

Let's calculate this step-by-step:

1. We need to calculate $$\sqrt{64} + (\sqrt{64})^2$$.
2. First, calculate $$\sqrt{64}$$. The square root of 64 is 8, since $$8 \times 8 = 64$$.
3. Next, calculate $$(\sqrt{64})^2$$. Since $$\sqrt{64} = 8$$, this is $$8^2$$.
4. $$8^2 = 8 \times 8 = 64$$.
5. Now, add the two results: $$8 + 64$$.
6. $$8 + 64 = 72$$.

Ответ: 72