Autograph: onscreen keyboard

The onscreen keyboard allows Autograph users to input one-line mathematical expressions using a wide variety of symbols that are coorrectly interpreted, eg
   sin²2θ, 2x−3y≤6, −b±√(b²−4ac), y=|x|
It is also invaluable when using a whiteboard or a walk-about tablet.
This short video explains

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