SOB 131 [Excellent]

Use Geogebra to simplify the following expression.

$$y^{5}(x+9)z^{2}y^{6}(x^2+14 x + 45)z^{4}$$

The answer in Geogebra should be precisely $y^{11} z^{6}$$(x+5)(x+9)^2$
Your tutor will check you have done this using Geogebra.