LMECBoard
Tap each corner · tap the first point to close
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Calculator
Grapher
Equations
Type on the right — the maths appears here
Maths symbols
Letters
Keyboard
Customize the tool wheel
Drag a tool onto either circle to place it — the spot you drop it between neighbors is where it goes. Drag a tool back to the list to set it aside. Inner circle holds up to 6 tools, outer up to 12.