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InvertIndices inverts indices of tensorsInvertIndices[type] inverts indices of specified typeExpand a power of a product:
def t = '(a*b*c)**d'.t println PowerExpand >> t
> a**d*b**d*c**d
Expand with respect to a:
def t = '(a*b*c)**d'.t println PowerExpand['a'] >> t
> a**d*(b*c)**d
Expand a square root:
def t = '(a*b)**(1/2)'.t println PowerExpand >> t
> a**(1/2) * b**(1/2)