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An online tool that plots level curves and calculates the partial derivatives for a 3D function.

Enter a function of *x* and *y* into the input below, select level curves to plot, and press "PLOT CURVES". Click on a specific point to calculate the partial derivatives there.

z =

*f _{x} = *

*f _{y} = *

*f _{xx} = *

*f _{yy} = *

*f _{xy} = *