Some of UNICODE Superscripts and Subscripts
Superscripted and Subscripted Letters
Superscripted and Subscripted Numbers
Superscripted and Subscripted Greek Letters
Superscripted and Subscripted Symbols
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For example: A + L₋ > A⁺⁺, or 2¹⁰ = 1024, or Wʰᵃᵗ?