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expands all powers of products and powers.
PowerExpand[expr, {x1, x2, ...}]
expands only with respect to the variables xi.
  • PowerExpand also converts (a^b)^c to a^(b c), whatever the form of c is.
  • The transformations made by PowerExpand are correct in general only if c is an integer or a and b are positive real numbers.
  • PowerExpand in general disregards all issues of branches of multivalued functions, so may not preserve the numerical values of expressions.
  • PowerExpand automatically threads over lists, as well as equations, inequalities and logic functions.
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