what are the simmilarities and differences between common law and equity ?

I'm sure a number of researchers would like very much to research your
question but frankly, the price you have selected just doesn't equate
to the amount of work it normally takes to research a question like
this.

If you haven't already done so, I would recommend that you read this
article "How to price your question" in the user guide. It provides a
number of tips on how you can appropriately price a question, or
adjust the price of an existing question accordingly in order to help
attract a quality researcher.

http://answers.google.com/answers/pricing.html

Regards;
Tutuzdad-ga

Our uni library has about three sets of shelves groaning under books
on this very subject. It's VERY wide. I think you should either revise
your question to allow a more specific answer, or raise the question
price and state what format your answer should take.