A simple beautiful calculator with key features:
-Num Lock Pad layout.
-Percentages and many other scientific functions.
-Basic graphing capabilities easily accessible.
-Swiping to get to scientific functions.
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Uses achartengine for graphing (http://www.achartengine.org/)
-fixed some minor bugs
-made the current equation and number scrollable
-fixed some bugs with negative numbers
-added help option to quickly learn the features