I have a matrix where some entries are complex or roots of unity. For example,
(-1)^(2/9) - (-1)^(5/9) + (-1)^(8/9)
is one such entry and it is equal to 0.
When I send such an entry to Wolfram|Alpha, it gives me zero. But I have matrix full of such identities, so I want to do the simplification on the whole matrix and inside Mathematica.
Is there is anyway I can do that?