In order to see more steps, go to 'Options', select 'Show: a lot of steps' and click 'Apply':

This way, you will see more step by step solution:

You can obtain an explanation for any step by clicking on it. Please note that you cannot click on the very first expression, which is the original problem. Quite often, several transformations will be performed within the same step. Use the explanation navigation buttons to step through all of them:

Click here to see the solution.