Let's first simplify the expression inside the parentheses:

log 0.3 9 - 2 log 0.3 10

= log 0.3 9 - log 0.3 100 (since log a - log b = log(a/b))

= log 0.3 (9/100)

= log 0.3 (0.09) (since 0.09 = 9/100)

= log 0.3 0.09

Now, we can rewrite this as:

log 0.3 0.09 = x (let's assume this value is x)

0.3^x = 0.09

Now, find x:

x = log 0.3 0.09

x = log 0.09 / log 0.3

x = -2 / -0.5229 (approximation of log 0.3 0.09)

x ≈ 3.819

Finally, we raise this value to the power of 4:

(3.819)^4 ≈ 224.306

So, the final answer is approximately 224.306.