LowerRightArrow[x, y, ...] displays as x \[LowerRightArrow] y \[LowerRightArrow] ....
LyonsGroupLy[] represents the sporadic simple Lyons group Ly.
MinusPlus[x] displays as \[MinusPlus]x.MinusPlus[x, y, ...] displays as x \[MinusPlus] y \[MinusPlus] ....
MonsterGroupM[] represents the sporadic simple monster group M.
NestedGreaterGreater[x, y, ...] displays as x \[NestedGreaterGreater] y \[NestedGreaterGreater] ....
NestedLessLess[x, y, ...] displays as x \[NestedLessLess] y \[NestedLessLess] ....
NotCongruent[x, y, ...] displays as x \[NotCongruent] y \[NotCongruent] ....
NotDoubleVerticalBar[x, y, ...] displays as x \[NotDoubleVerticalBar] y \[NotDoubleVerticalBar] ....
NotEqualTilde[x, y, ...] displays as x \[NotEqualTilde] y \[NotEqualTilde] ....
NotExists[x, y] displays as \[NotExists] _x y.