The problem asks us to simplify the expression $(9x^3y)(-2x^2yz^5)$.

1. Problem Description

The problem asks us to simplify the expression $(9x^3y)(-2x^2yz^5)$.

2. Solution Steps

We need to multiply the two terms together.

First, we multiply the coefficients: $9 * -2 = -18$.

Next, we multiply the $x$ terms: $x^3 * x^2 = x^{3+2} = x^5$.

Then, we multiply the $y$ terms: $y * y = y^{1+1} = y^2$.

Finally, we include the $z^5$ term.

Putting it all together:

$x^a * x^b = x^{a+b}$

$(9x^3y)(-2x^2yz^5) = (9 * -2)(x^3 * x^2)(y * y)(z^5) = -18x^5y^2z^5$.

3. Final Answer

$-18x^5y^2z^5$