I think there are some missing brackets in the following statement. This is in Chapter 2 Exercise 5.

(3.31 (10-8 + 2.01 ( 10.7) / (7.16 ( 10-6 + 2.01 ( 10-8)

There are no missing brackets. I think the question is poorly posed and is confusing. Viewing the answer on P. 475 provides clarification of the question. Though the point is the code, not the math, I agree it's difficult to write the code without understanding the problem. Incidentally, the math answer I get is 2.024487141