| "\\over" -> FUN_INFIXh ("\\over ", fun num den -> Html.html_render num, "<hr style=\"{background: black}\"/>", Html.html_render den)
| "\\sqrt" -> FUN_AR1 "\\sqrt "
| "\\cancel" -> FUN_AR1 "\\cancel "
+ | "\\bcancel" -> FUN_AR1 "\\bcancel "
+ | "\\xcancel" -> FUN_AR1 "\\xcancel "
| "\\cancelto" -> FUN_AR2 "\\cancelto "
| "\\pmod" -> FUN_AR1hl ("\\pmod ", ("(mod ", ")"))
| "\\bmod" -> FUN_AR1hl ("\\bmod ", ("mod ", ""))