This is a free online math/scientific calculator similar to those from TI, Casio, HP and others.
It supports functions for algebra and trigonometry.
Enter a formula either by typing on the keyboard, pressing the buttons on the calculator with the mouse,
or a mixture of both.
This is not a graphing calculator, but see
Graphical Function Explorer (GFE) which allows you to graph up to three functions at once with
up to four independent variables controlled by sliders.
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