Wolfram Language & System 10.3 (2015)|Legacy Documentation

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FunctionExpand

FunctionExpand[expr]
tries to expand out special and certain other functions in expr, when possible reducing compound arguments to simpler ones.

FunctionExpand[expr,assum]
expands using assumptions.

Details and OptionsDetails and Options

Introduced in 1996
(3.0)
| Updated in 2008
(7.0)