NotRightTriangle[x, y, ...] displays as x \[NotRightTriangle] y \[NotRightTriangle] ....
NotSquareSubsetEqual[x, y, ...] displays as x \[NotSquareSubsetEqual] y \[NotSquareSubsetEqual] ....
NotSquareSubset[x, y, ...] displays as x \[NotSquareSubset] y \[NotSquareSubset] ....
NotSquareSupersetEqual[x, y, ...] displays as x \[NotSquareSupersetEqual] y \[NotSquareSupersetEqual] ....
NotSquareSuperset[x, y, ...] displays as x \[NotSquareSuperset] y \[NotSquareSuperset] ....
NotSucceedsEqual[x, y, ...] displays as x \[NotSucceedsEqual] y \[NotSucceedsEqual] ....
NotSucceeds[x, y, ...] displays as x \[NotSucceeds] y \[NotSucceeds] ....
NotSucceedsSlantEqual[x, y, ...] displays as x \[NotSucceedsSlantEqual] y \[NotSucceedsSlantEqual] ....
NotSucceedsTilde[x, y, ...] displays as x \[NotSucceedsTilde] y \[NotSucceedsTilde] ....
PrecedesEqual[x, y, ...] displays as x \[PrecedesEqual] y \[PrecedesEqual] ....