SOB 131 [Excellent]

Use Geogebra to simplify the following expression.

$$y^{3}(x+9)z^{6}y^{5}(x^2+11 x + 18)z^{3}$$

The answer in Geogebra should be precisely $z^{9} y^{8}$$(x+2)(x+9)^2$
Your tutor will check you have done this using Geogebra.