To simplify this expression, we can first rewrite each term with a common denominator of 10:

28^-43/10 = (1/28)^43 10
7^53/10 = 10^(53/10) 7
4^-33/10 = (1/4)^33 * 10

Now we can multiply these terms together:

(1/28)^43 10 10^(53/10) 7 (1/4)^33 * 10

Simplifying further:

= 10 10 10^(53/10) 7 / (28^43 4^33)
= 1000 10^(53/10) 7 / (28^43 * 4^33)

This is the simplified expression.