DG and DBC math have way more calculations than the actual DAT. I never finished the practice on time and barely finished on the actual. If you can do either in the time limit you'll probably finish the real test with time to spare. The medium length calculations were my long calculations on the real. I had a lot of quick "you know it or you don't" questions on my DAT like trig. That being said, don't forget about the easy math!