I hate to bring this up, but the math is important. I mean, really important. The good news is that it's mostly simple stuff. Just take them one at a time. I don't know the standards for the class you're taking. But I think that by the time you are diving unsupervised with deco obligations you should be able to do the important stuff in your head so that simple things like data entry errors in MD or your computer are obvious to you, and so you can adjust on the fly underwater if needed.
There are lots and lots of people on this board with more diving and tech diving experience than I will ever get. That said, in my estimation the most important tool you bring with you on technical dives is the one between your ears. Making that tool sharp and workable under pressure (double entendre intended) is crucial.