Click on the calculator app to open it and the X to close it. Also, you can slide the apps around.
Credit to @bobcheezymemes for and @1132262 for the sliding apps. Credit to @jefsan777 for some of the graphics. Credit to @1132262 for some tips on the graphics. Also, @bobcheezymemes pointed out that numbers can't go to the power of a negative number or 0
