ExcludedForms is an option for FullSimplify which can be set to a list of patterns for expressions that should not be touched if they are encountered at intermediate steps in ...

% n or Out[n] is a global object that is assigned to be the value produced on the n\[Null]^th output line. % gives the last result generated. %% gives the result before last. ...

$TemporaryDirectory gives the main system directory for temporary files on your computer system.

Finding the structure of polynomials written in expanded form. Here is a polynomial in two variables. This is the polynomial in expanded form.

Denominator[expr] gives the denominator of expr.

x/y or Divide[x, y] is equivalent to x y^-1.

Short[expr] prints as a short form of expr, less than about one line long. Short[expr, n] prints as a form of expr about n lines long.

WhittakerW[k, m, z] gives the Whittaker function W k, m (z).

$OutputSizeLimit specifies the maximum size in bytes of expressions that will automatically be output in their entirety in a Mathematica notebook.

When you do symbolic calculations, it is quite easy to end up with extremely complicated expressions. Often, you will not even want to see the complete result of a ...