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  GizmoCalc 2 Jan 15

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  Berkeley Madonna 11 Nov 16

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  YP Image 4 Jan 15

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  MultiSpec 2 Sep 17

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  Rad 20 Sep 15

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  DeltaGraph 9 Jan 17

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  The Geometer's Sketchpad 11 Dec 14

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  Maple 5 May 20