### Video Transcript

Add seven ππ minus two π squared π squared minus π cubed π squared to eight π cubed π squared minus nine π squared π squared minus five ππ.

In order to add these two expressions, we need to collect or group the like terms. Seven ππ minus five ππ is equal to two ππ. Negative two π squared π squared minus nine π squared π squared is equal to negative 11π squared π squared, as negative two minus nine equals negative 11. Negative π cubed π squared plus eight π cubed π squared is equal to seven π cubed π squared, as negative one plus eight is equal to seven.

This means that our final answer is two ππ minus 11π squared π squared plus seven π cubed π squared. We could rewrite these three terms in any order as long as the two ππ is positive, the 11π squared π squared is negative, and the seven π cubed π squared is positive. For example, the answer could also be written seven π cubed π squared minus 11π squared π squared plus two ππ.