Read Math Notes box in Lesson 1.3.1 on scientific notation.

$6.6 × 10^7$

Read Math Notes box in Lesson 1.3.2 to review the rules of exponents.

Multiply the all of the exponents in the parentheses by $3$. Remember $3 = 3^{1}$. In the numerator you have
$( -3^{1 \cdot 3} · x^{2 \cdot 3})$. In the denominator you will have $y^{-2 · 3}$.

Make sure final answer has no negative exponents.

$-27x^6y^6$

Use a generic rectangle.
Read Math Notes box in Lesson 3.2.5 for more help.

Remember $(x − 2)^2$ is equivalent to $(x − 2)(x − 2)$.
See part (c) for more help.