Cadabra
a field theory motivated approach to computer algebra

collect_factors

Collect identical factors in a product.
Collect factors in a product that differ only by their exponent. Note that factors containing sub- or superscripted indices do not get collected (i.e. $A_m A^m$ does not get reduced to $(A_m)^2$).
ex:=A A B A B A;
\(\displaystyle{}A A B A B A\)
collect_factors(_);
\(\displaystyle{}A^{4} B^{2}\)
Arbitrary powers can be collected this way,
ex:=X X**(-1) X**(-4);
\(\displaystyle{}X X^{-1} X^{-4}\)
collect_factors(_);
\(\displaystyle{}X^{-4}\)
The exponent notation can be expanded again using expand_power.
ex:=X**4; expand_power(_);
\(\displaystyle{}X^{4}\)
\(\displaystyle{}X X X X\)
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