What the simplified answer to the question

Answer:
[tex] \frac{ {y}^{6} }{ {8x}^{18} } [/tex]
Step-by-step explanation:
My entire methodology is in the picture but I'm just gonna quickly explain why I did what I did.
Step 1: If you have a negative exponent that's part of the expression then flip its place (If in numerator flip it to denominator and vice versa) but DONT flip its coefficient. Those stay where they are.
Step 2: When the entire expression is to a negative power, flip the entire expression. The numerator becomes the denominator and the denominator becomes the numerator. Keep in mind that this flip only gets rid of the negative power that encompasses the expression. Any negatives that are still inside the expression remain the same.
Step 3: If you have an entire expression that's being raised to a power then multiplication is your friend. The key here is that "A power to a power means multiply whereas a power times a power is addition". This is a rule that is often misused at least in my experience.
Step 4: Just basic numerical simplification