junk = (x-3)x(x-2)(x-1) 
[Graphics:indexgr2.gif][Graphics:indexgr4.gif]

[Graphics:indexgr2.gif][Graphics:indexgr5.gif]
[Graphics:indexgr2.gif][Graphics:indexgr6.gif]
[Graphics:indexgr2.gif][Graphics:indexgr7.gif]

junk1 = Integrate[junk,x]
[Graphics:indexgr2.gif][Graphics:indexgr8.gif]

Note: junk1 is the derivative of junk. 

Plot[junk1,{x,-3,4}]
[Graphics:indexgr2.gif][Graphics:indexgr9.gif]
[Graphics:indexgr2.gif][Graphics:indexgr10.gif]