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ComplexExpand

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ComplexExpand[expr]
expands expr assuming that all variables are real.
ComplexExpand[expr, {x1, x2, ...}]
expands expr assuming that variables matching any of the xi are complex.
  • The variables given in the second argument of ComplexExpand can be patterns.
  • ComplexExpand automatically threads over lists in expr, as well as equations, inequalities and logic functions.
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