In this example question it says draw a structure for the following condensed formula. Here we have Chapter 3, and then in parentheses chapter 2, and then a subscript of three, followed by chapter 3 again. So here we're going to say we're starting out with chapter 3.
So we have a carbon connected to three hydrogens. It is now connected to three of these chapter twos. So we're going to have Chapter 2 here in the middle, another Chapter 2 here in the middle, and then finally our third Chapter 2 here in the middle.
That last one is connected to the CH3 at the end, so this would represent our structural formula when given this condensed formula.