You have typed in double fraction. The solver can simplify the fraction. To adjust the number of steps shown go to 'Options', select the number of steps you want to show and click on 'Apply'.

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.