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Hi,

My name is Carl Antaki.I agree with all the suggestions of Stefano.

I would like to add things that may be improved in the next OS:

1.A better Y editor that can except Y's and X's especially for the conics because using the 3D graph mode with implicit format will take a long time.

2.Graphing inequalities.

3.A better cover to the AMS programs.

4.An anti-crash protection.