Shows the sequence of Unicode characters
U+0069 .mw-parser-output .smallcaps{font-variant:small-caps}latin small letter i
U+002B plus sign
U+00B1 plus-minus sign
U+2213 minus-or-plus sign (for fonts which contain it)
U+0049 latin capital letter i

using the fonts: Arial, Times New Roman, Cambria Math, Linux Libertine, Adobe Garamond, Everson Mono, and Andron Mega Corpus.
Own work
Karl432