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$\frac{{b}^{2}+\sqrt{{A}^{2}-2\mathrm{BC}{}^{}}}{2A\text{}}$

I have yet to figure out how to do a +/- character.

$\sum _{i=0}^{N}\left(\frac{1}{{{i}^{2}}^{}}\right)$

I think that Amaya is still a little rough around the edges, and needs more work. In particular, it is hard to know what fields still need entering.

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