Each of the sets of coordinates in parentheses should be in Nemeth mode, because they are enclosed lists. The "Q" unspaced from an enclosed list should also be in Nemeth mode. In addition, the shape/line label "QR" (especially with a line over it) should be in Nemeth mode. "x-intercept", "point", and "segment" can remain in UEB.
I hope that helps! If you have follow-up questions or additional ones, please do post them.