to view the calculate menu.

.
Press
to select
value which evaluates a function for a given value of x.
Press
to select
root which finds an x intercept.
Press
to select
minimum which finds a relative minimum.
Press
to select
maximum which finds a relative maximum.
Press
to select
intersect which finds a point of intersection.
Press
to select dy/dx which finds the derivative of a function.
Press
to select
which finds the value of the integral of a function.