Calculator Assignments due in recitation
Make sketches of the calculator screen and hand those in when
called for. Be sure to indicate the axis scales on any sketch.

1.) Use the a graph of the integrand to decide if the integral over
the specified region is positive or negative. Then use the graph
to get a rough estimate of the value of the integral.
Then use the methods of partial fractional decomposition
to get an exact value of the indicated integral.
a.)  1/(4*x^2-8*x-12) from 0 to 2.
b.)  1/(5+4*x-x^2) from 0 to 4.