For an assignment, I'm to enter the text:

Swimming
Beginning (5)
Intermediate (5)
Advanced (5)

The number 5 in parentheses designates total times for the class.

When I try to insert (5) in the cell and hit "Enter", what it shows is (504))

Even when I've tried to format the cell, it does not allow me to enter (5)!

Any help would be appreciated.