math symbols

Use real characters, not alphabetic susbstitutes

If you need math sym­bols infre­quently—some light addi­tion and sub­trac­tion, the occa­sional neg­a­tive num­ber—you can get by with­out spe­cial sym­bols. Use the plus sign + and equals sign = as usual. Use the en dash as a minus sign (see hyphens and dashes).

If you need to do mul­ti­pli­ca­tion or beyond, insert real math sym­bols by hand.