Some Maple Hints

• To use linear algebra functions, execute the Maple command with
  with(linalg):
• In Maple a vector is enclosed in square brackets, for example:

  f:=[y,-x^3+x+(3/2)*x^2+y-x^2*y];

• If g(t)=[x(t),y(t)], then f(g(t)) can be written in Maple as

  G:=subs(x=x(t),y=y(t),f);

  (Note: substitute your parametrization of the circle for x(t) and y(t) in the above.)

• Make sure n is a unit vector. (This calculation is easily done by hand.)
• If G and n are both vectors then Maple will compute their dot product by

  Q:= innerprod(G,n);

• The integral can then be written as
  int( stuff_to_integrate, t=0..2*Pi);
  Make sure that all of the pieces of the line integral are accounted for!