re #9653 improve math formatting

Code/Mantid/docs/source/algorithms/OptimizeCrystalPlacement-v1.rst

@@ -29,10 +29,11 @@ The crystal orientation matrix, UB, from the PeaksWorkspace should
 index all the runs "very well". Otherwise iterations that slowly build a
 UB with corrected sample orientations may be needed.
 
-The parameters for the tilt are GonRotx, GonRoty, and GonRotz in
+The parameters for the tilt are GRotx, GRoty, and GRotz in
 degrees. The usage for this information is as follows:
 
-:math:`rotate('x',GonRotx)*rotate('y',GonRoty)*rotate('z',GonRotz)* SampleOrientation( i.e. omegaRot*chiRot*phiRot)).`
+:math:`rotate(x,GRotx)*rotate(y,GRoty)*rotate(z,GRotz)* SampleOrientation`
+:math:`( i.e. omegaRot*chiRot*phiRot)).`
 
 Note: To optimize by the tilt in the goniometer and then by the angles
 or by the sample position, it is possible to run with one optimization,