Worked Solution #1 of 5, increasing in difficulty.

Expand the following:

\begin{align} \quad\quad\quad\quad\quad\quad\quad\quad\Large x^3 x^5\\ \\ &\cssId{Step1}{\Large = { x^{3+5}} }\\ \\ &\cssId{Step2}{\Large = { x^8} }\\ \\ \end{align}