__Example__:*f* (*x*)=*x*^{2}-1

** Click** the "Graph" button
(this button also refreshes the graph).

** Enter** the antiderivative

__Example__:*F* (*x*)=*x*^{3}/3-*x*

** Enter** the endpoints of the interval [

**Example:**
[

** To erase** the graph and all input fields, click the
"Clear" button.

[

__Exponential__:

*f* (*x*)=*e ^{x}*

[

__Trigonometric__:

*f* (*x*) = cos *x*

*F* (*x*) = sin *x*

[*a*,*b*]=[0,3]

In the "Polynomial" example above,
part of the shaded area is above the *x*-axis
(in blue) and part below it
(in red). The area above the axis is a bit
larger than the area below it, giving a positive value for net area
(blue area *minus*
red area).