I have a somewhat large expression in inner products, ``` zeta = ( - <e0, e0> * <e1, e1> * <e2, e2> + 4 * <e0, e1> * <e1, e2> * <e2, e0> + ( + <e0, e0> * <e1, e2> + <e1, e1> * <e2, e0> + <e2, e2> * <e0, e1> ) * ( + <e0, e0> + <e1, e1> + <e2, e2> - <e0, e1> - <e1, e2> - <e2, e0> ) - <e0, e0>**2 * <e1, e2> - <e1, e1>**2 * <e2, e0> - <e2, e2>**2 * <e0, e1> ) ``` and the symmetry in the expression has me suspect that it can be further simplified. Is sympy capable of simplifying vector/dot product expressions? A small example that, for example, takes ``` <a, c> + <b,d> - <b,c> - <a, d> ``` and spits out ``` <a-b, c-d> ``` would be great.
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