Question

Simplify 9^3 x 5^3 x 9 x 5^4 x 9^5 x 5.

Answer 1

`9^(3)*9*9^(5)*5^(3)*5^(4)*5\\=9^(9)*5^(8)`

That is your simplified answer. This is achieved through exponent laws
`a^(m)*a^(n) = a^(m+n)`, where equal bases raised to powers multiplied is equal to the base raised to the powers added.