3) (6² - 2²) x 2 =

Let's calculate step by step:

First, we need to calculate the values inside the parentheses:

$$6^2 = 6 \times 6 = 36$$ $$2^2 = 2 \times 2 = 4$$

Now subtract:

$$36 - 4 = 32$$

Next, we multiply by 2:

$$32 \times 2 = 64$$

So, the answer is:

(6² - 2²) x 2 = 32 x 2 = 64