calculate surface area between two curves

I want to get the surface area between the two curves. one curve is symbolic function curve (ezplot) and one other is numerical data curve (plot). What should I do?

[sixwwwwww]

can you show your curves?

[Ehsan]

Answer 1

[Thomas]

This might help: http://www.mathworks.com/matlabcentral/answers/15653-evaluating-the-area-between-two-curves

[Ehsan]

If functions intersect in several point this description does not apply