combine terms with powers
combine(f, power, symbolic)
(optional) literal name; allow formal symbolic manipulation of expressions
Expressions involving powers are combined by applying the following transformations:
for arbitrary x, y, z, integers a,b>1 , and rational n, when those transformations are valid.
If you specify the symbolic option, Maple performs formal symbolic manipulation of the expression f without regard to the analytical issue of branches for multi-valued functions.
Note: The sqrt command automatically applies a set of simplifications and normalizations that are not applied automatically by ^(1/2), thus the latter requires the use of combine.
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