Other Mathematical Notation

The Wolfram Language supports an extremely wide range of mathematical notation, although often it does not assign a predefined meaning to it. Thus, for example, you can enter an expression such as xy, but the Wolfram Language will not initially make any assumption about what you mean by .

The Wolfram Language knows that is an operator, but it does not initially assign any specific meaning to it.
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This gives the Wolfram Language a definition for what the operator does.
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Now the Wolfram Language can evaluate operations.
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A few of the operators whose input is supported by the Wolfram Language.

The Wolfram Language assigns builtin meanings to and , but not to or .
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There are some forms which look like characters on a standard keyboard, but which are interpreted in a different way by the Wolfram Language. Thus, for example, [Backslash] or Esc displays as but is not interpreted in the same way as a typed directly on the keyboard.

The and characters used here are different from the and ^ you would type directly on a keyboard.
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Most operators work like and go in between their operands. But some operators can go in other places. Thus, for example, Esc and Esc or [LeftAngleBracket] and [RightAngleBracket] are effectively operators which go around their operand.

The elements of the angle bracket operator go around their operand.
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Some additional letters and letterlike forms.

You can use letters and letterlike forms anywhere in symbol names.
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is assumed to be a symbol, and so is just multiplied by a and b.
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