CellEvaluationDuplicate is an option for Cell which specifies whether the front end should make a copy of the cell before performing any evaluation of its contents that you ...
CircleMinus[x, y] displays as x\[CircleMinus]y.
ColorNegate[image] gives the negative of image, in which all colors have been negated.
ConwayGroupCo2[] represents the sporadic simple Conway group Co_2.
DefaultDuplicateCellStyle is a notebook option that specifies the default style to use for cells created by automatic duplication of other cells in the notebook.
DefaultNewCellStyle is a notebook option which specifies the default style to use for new cells created in the notebook.
DifferentialD[x] displays as \[DifferentialD]x.
DisplayFunction is an option for graphics and sound functions that specifies a function to apply to graphics and sound objects before returning them.
FischerGroupFi22[] represents the sporadic simple Fischer group Fi_22.
FischerGroupFi23[] represents the sporadic simple Fischer group Fi_23.