.BI expand( expression )
\- expands an expression
.br
+.BI factor( expression )
+\- factorizes an expression (univariate)
+.br
.BI find( expression ", " pattern )
\- returns a list of all occurrences of a pattern in an expression
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.BI transpose( matrix )
\- transpose of a matrix
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-.BI unassign( symbol )
-\- unassign an assigned symbol
+.BI unassign( 'symbol' )
+\- unassign an assigned symbol (mind the quotes, please!)
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.BI unit( expression ", " symbol )
\- unit part of a polynomial