(3xy^2z^2)(-3x^3y^3z)^2
Sorry Chloe, I think you messed up a little.
$$\\(3xy^2z^2)(-3x^3y^3z)^2\\\\(3xy^2z^2)(9x^6y^6z^2)\\\\27x^7y^8z^4\\\\$$
((81*x^8)*y^10)*z^6
hope this helped.