Integral Calculus in .net

Question

Hi all,
 
Can anybody tale me that how do i use integration in .net is there any built in facility ....if not is there any kind of solution anyone have ???.... because i have resolve an equation that equation is

PT = (A/T)(1 – e-T/k2) + 1/T ?[BMR + (MAP – BMR)(1-e-t/k1)]dt

In .net Or Sql Server 2005
I am not asking for providing code, but if anyone can post approach for it then it will be highly appreciated.

Thanks and Regards`
Mayank Sharma