My daughter and I are working on the SolidWorks tutorial that teaches adding equations to control locations, this one is locating screw holes in a Hinge.  No matter whether we follow the instructions and no matter how we rewrite the formula, we get a syntax error and cannot proceed.  Are the instructions faulty, is the student version limited from doing this function, or are we blind, or is there something in our other software causing a conflict?  We have attached a screen shot and a copy of the instructions.

Thanks!