Is anyone familiar with using Atlas 2 for mathematica?

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fu11meta1
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Is anyone familiar with Atlas 2 for mathematica to calculate the Riemann Tensor, Ricci Tensor, and scalar I have a metric that I need to calculate these things for. Can anyone help? I'm not too up on Mathematica either.
 
I am use Mathematica for a while. One can define his own functions to calculate all these quantities, Atlas 2 is not free.