Calculate the following expressions involving square roots, parentheses, and basic arithmetic operations.

$$1$$

The result is $\boxed{1}$.

b) $\sqrt{64} - (5-6)$

$$8 + 1$$ $$9$$

The result is $\boxed{9}$.

c) $(8-10) + \sqrt{36}$

$$4$$

The result is $\boxed{4}$.

d) $(8-12) + \sqrt{8}$

$$(-4) + \sqrt{4 \times 2}$$ $$-4 + 2\sqrt{2}$$

The result is $\boxed{-4 + 2\sqrt{2}}$.

e) $\sqrt[3]{125} - (6-9)$

$$5 + 3$$ $$8$$

The result is $\boxed{8}$.

f) $(-4-7) + \sqrt{9}$

$$-8$$

The result is $\boxed{-8}$.

3. Calculate.

a) $\sqrt{25} + (5+4) + (6^2)$

$$14 + 36$$ $$50$$

The result is $\boxed{50}$.

b) $(\sqrt{9}) + \sqrt{36} - (6+2)$

$$9 - 8$$ $$1$$

The result is $\boxed{1}$.

c) $\sqrt{125} + (3) + (5-6)$

$$\sqrt{25 \times 5} + 3 + (-1)$$ $$5\sqrt{5} + 3 - 1$$

$$5\sqrt{5} + 2$$

The result is $\boxed{5\sqrt{5} + 2}$.

d) $(5+4) - (5^3) - (\sqrt[3]{8})$

$$-116 - 2$$ $$-118$$

The result is $\boxed{-118}$.

e) $(10-5) + (\sqrt{81}) - (6^2)$