history: I had a great day at work today; I really killed it! I had a great day at work today!  We are working on some pretty complex accounting_comma_ and I've had to do a lot of prep at night. 
current: That's really awesome, what makes it so complex?
next: There are many different variables that need to be taken into account-- things that I don't usually deal with on a day to day basis.  But my extra prep at night has made it so that it's seeming easy.