It may seem that one could simply memorize these antiderivatives and antidifferentiating would be as easy as differentiating. This is {{CMD_84}}not{{CMD_85}} the case. The issue comes up when trying to combine these functions. When taking derivatives we have the {{CMD_86}}product rule{{CMD_87}} and the {{CMD_88}}chain rule{{CMD_89}}. The analogues of these two rules are much more difficult to deal with when taking antiderivatives. However, not all is lost.