ROUTINE:
(commonplace tasks, chores, or duties as must be done regularly or at specified intervals)
minus (-)
R U T
(a fixed or established mode of procedure or course of life, usually dull or unpromising)
equals (=)
O I N E
(annoy [east Lancashire], also stop oining me)
minus (-)
O N E
(existing, acting, or considered as a single unit, entity, or individual)
equals (=)
I
(the ninth letter of the English alphabet, a vowel.)
{Or… (alternate version)}
equals (=)
I
(used to denote the narrator of a literary work written in the first person singular).
Sometimes I think I’d just rather be a letter.