To simplify this expression, we can use the rules of exponents.
First, let's simplify the numerator:
(x^-9 × x^2)^2 = (x^-7)^2 = x^-14
Next, let's simplify the denominator:
(x^3 × x^4)^3 = (x^7)^3 = x^21
Now, we can simplify the entire expression:
(x^-9 × x^2)^2/(x^3 × x^4)^3 = x^-14/x^21
Using the rule of subtracting exponents when dividing, we can simplify further:
x^-14/x^21 = x^(-14-21) = x^-35
So, the simplified expression is x^-35.