Put the cake mix in the large bowl. Measure out the water in the liquid measuring cup. Pour it into the bowl. Measure out the oil in the same cup. Pour it into the bowl, too. Crack 1 of the eggs on the edge of the bowl. Open the shell, letting the egg slide into the bowl. Do the same thing with the other 2 eggs. Use the electric mixer on low speed to beat everything in the bowl for 30 seconds. Then beat on medium speed for 2 minutes, scraping the inside edges of the bowl every once in a while with the rubber spatula.