Whitespace (Built-in Mathematica Symbol)

Whitespace represents a sequence of whitespace characters in StringExpression.

Plus (Built-in Mathematica Symbol)

x + y + z represents a sum of terms.

Special Characters (Mathematica Guide)

Mathematica not only has systemwide support for arbitrary Unicode characters, but also includes nearly a thousand carefully designed characters for mathematical notation and ...

SubsuperscriptBox (Built-in Mathematica Symbol)

x_y^z is the low-level box representation for x_y^z in notebook expressions.

RadicalBox (Built-in Mathematica Symbol)

RadicalBox[x, n] is a low-level box construct that represents the displayed object Power[x, (n)^-1] in notebook expressions.

SqrtBox (Built-in Mathematica Symbol)

SqrtBox[x] is a low-level box construct that represents the displayed object Sqrt[x] in notebook expressions.

SubscriptBox (Built-in Mathematica Symbol)

SubscriptBox[x, y] is the low-level box representation for x_y in notebook expressions.

SuperscriptBox (Built-in Mathematica Symbol)

SuperscriptBox[x, y] is the low-level box representation for x^y in notebook expressions.

UnderoverscriptBox (Built-in Mathematica Symbol)

UnderoverscriptBox[x, y, z] is the low-level box representation for x_y^z in notebook expressions.

Manipulating Expressions like Lists (Mathematica Tutorial)

You can use most of the list operations discussed in "Lists" on any kind of Mathematica expression. By using these operations, you can manipulate the structure of expressions ...