The easiest of the integration techniques is u substitution.  For this, one
simply seeks to find a way to substitute u = g(x) into   in 
such a way as to make the resulting integral,
  in 
such a way as to make the resulting integral,   an integral of one of the basic forms listed above (or 
some other simple integral.)
  an integral of one of the basic forms listed above (or 
some other simple integral.)