Evaluate without using tables or calculators: sqrt(0.8064 6.048 / 1.008 0.1344) and -4 of [(-4 + -5 / 15) + -3 - 4 / 6] / (84 / -7 + 3 - (-5)).

Notice that $8064 \div 1008 = 8$.

$$\sqrt{\frac{8 \times 1008 \times 6048}{1008 \times 1344}} = \sqrt{\frac{8 \times 6048}{1344}}$$

Now, simplify $\frac{6048}{1344}$.

$$\frac{6048}{1344} = \frac{6048 \div 1344}{1344 \div 1344} = 4.5 = \frac{9}{2}$$

$$\sqrt{\frac{8 \times 9}{2}} = \sqrt{4 \times 9} = \sqrt{36} = 6$$

The value is $\boxed{\text{6}}$.

2. Evaluate;

$$\frac{-4 \text{ of } [(-4 + -5 \div 15) + -3 - 4 \div 6]}{84 \div -7 + 3 - (-5)}$$

First, evaluate the expression inside the brackets: $[(-4 + -5 \div 15) + -3 - 4 \div 6]$
Inside the first parenthesis: $(-4 + -5 \div 15)$

$$-5 \div 15 = -\frac{1}{3}$$ $$-4 + \left(-\frac{1}{3}\right) = -\frac{12}{3} - \frac{1}{3} = -\frac{13}{3}$$

Now substitute this back into the brackets: $\left[-\frac{13}{3} + -3 - 4 \div 6\right]$
Perform the division: $4 \div 6 = \frac{4}{6} = \frac{2}{3}$
The expression in brackets is: $\left[-\frac{13}{3} - 3 - \frac{2