Assuming 8838 is required, the following results were found.

  • Useful XHTML Character Entities

    subset of, U+2282 ISOtech sup ⊃ ⊃ superset of, U+2283 ISOtech nsub ⊄ ⊄ not a subset of, U+2284 ISOamsn sube ⊆ ⊆ subset of or equal to, U+2286 ISOtech supe ⊇ ⊇ superset of or equal to, oplus ⊕ ⊕ circled plus = direct sum,...

    https://www.waltercedric.com/index.php/development/124-java/references/1081-

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