hello hima

I am designing a project for online test series for all subject like mathematics, physics, chemistry, . I have a problem in storing mathematical questions which includes special symbols in organic chemistry structural formulas etc.How can we store in sql server 2005 database .i tryed by importing the mathematical and chemical formula in SQL server database using.XLS file but in place of chemical formula and mathematical equation its showing null or different character.in database. after storing it in database i want to retrive it on asp.net web page using c#. Your's sincerely PANKAJ