3 lines
215 B
Text
3 lines
215 B
Text
OpenerView[{1, Column@{OpenerView[{2, Column@{OpenerView[{4, 7}, True], 5}}, True],
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OpenerView[{3, OpenerView[{TraditionalForm[Cos[x]], Plot[Cos[x], {x, 0, 10}, ImageSize -> 150]},
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True]}, True]}}, True]
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