If you would like to enable Shared Workbook option, here's a way to add it to Excel Quick Access Toolbar. It is hidden under Excel Options.

For adding Windows Calculator to the Excel Toolbar, follow the following steps. Move the mouse cursor to the upper left-hand corner of your Excel sheet and look for the drop-down arrow.

2/ Add a calculator to the excel toolbar There's a calculator in Excel 2010 but by default this feature is hidden, to get the calculator on your Excel screen navigate to Quick Access toolbar ...

Google's free add-on for versions of Word, Excel, and PowerPoint in Office 2003, 2007, and 2100 makes it easy to save, share, and sync DOC, XLS, and PPT files to Google Docs.