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In the Main Window (shown here) input
your expressions to evaluate on the top line, then press <enter>,
and the result is displayed on the bottom line. |

The Main Window can can be "scaled down" so
that the toolbar is no longer visible. |

The Expression History Window shows all your
previously evaluated expressions, which can then be copied or inserted
back into the Main Window.
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The Button Extension Window can be used for
one-click calculations. |

Graph and investigate your functions on the X-Y plane
with the Graph Window.
More Info. |

Store values to variables and use the Variables
Manager Window to display, edit, and manage them. |

The Function Catalog shows all the functions
and operations supported by the program.
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