Graphing equations, 2D or 3D, is easy with this graphing calculator. Simply type down the desired equation and click on the draw button (eg. y=sin(x)+3x or 5x=sin(xy)+y) and let our advanced graphing calculator take care of the rest. 3D graphing can be achieved by simply introducing a z variable in the equation. There are tools included in the graphing calculator for slopes, area under curve, matrix transformation. Version 5.8 has ability to save and reopen axis and draw properties as well as the equations, ability to plot polygons from a list of points, and has several enhancements and bugs fixed.