Exponent Expressions

[kdc2009]

Multiply and simplify completely, including the elimination of all negative exponents:


Here is as far as I've gotten:

16x^36 * 125y^3 / 625y^40 * 4x^(-9)

Please help if you can!

 

[pka]

Multiply and simplify completely, including the elimination of all negative exponents:
View attachment 12253

I would start with
\(\displaystyle \frac{2^4x^{36}}{5^4y^{40}}\cdot~\frac{5^3x^9y^3}{2^2}\)