After purchasing a Shape Math subscription you can see how the pieces fit together by going up to the Web application at the top left of your browser or by clicking here.
Once in the application you can click on the tab with the grayed out Shape Math pieces on it at the bottom of your browser.
Here you can click the left or right arrows to select the Shape Math number you would like the outline of. You can try as many different ways of fitting the Shape Math pieces into an outline as you want. What ever way you can fit them in will equal that number.
Here is an example: 5+2=7
It also works for other numbers like nine. Example one: 5+4=9
Example two: 4+4+1=9