Pattern to avoid nested try catch blocks?

Question

Consider a situation where I have three (or more) ways of performing a calculation, each of which can fail with an exception. In order to attempt each calculation until we f

Answer 1

What about tracking the actions your doing...

double val;
string track = string.Empty;

try 
{ 
  track = "Calc1";
  val = calc1(); 

  track = "Calc2";
  val = calc2(); 

  track = "Calc3";
  val = calc3(); 
}
catch (Exception e3)
{
   throw new NoCalcsWorkedException( track );
}