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

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

** Enter** the antiderivative

__Example__:*F* (*x*)=*x*^{4}/4-*x*^{2}/2

** Enter** the function

__Example__:*g*(*x*)=*x*

** Enter** the antiderivative

__Example__:*G*(*x*)=*x*^{2}/2

** Enter** the endpoints of the interval [

**Example:**
[

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

__Trigonometric__:*f* (*x*)= sin *x*,
*F* (*x*)= cos *x*,
*g* (*x*)= cos *x*,
*G* (*x*)= -sin *x*,
[*a*,*b*]=[0.7854,2.3562]

In the "Polynomial" example above,
the regions shaded have part with *f* (*x*) above
*g*(*x*)
(in blue) and part reversed
(in red). The two areas are exactly the same,
giving a value of zero for net area
(blue area *minus*
red area).