IT'S MATH, NOT MATHS, DAMMIT!!! D:<

Goddamn limey faggots.

You don't say "Chemistries", do you?
Or "Calculuses" (Calculi?)?
Or "Algebras"?
Or "Psychologies"?

>>1

OP, yes, we do. I suggest not arguing with any averagely educated Brits about this; their English skills far outstrip any averagely educated Americans.

Plural of calculus = calculi, algebra doesn't have an everyday plural in English since it's Arabic (the standard plural of this type of Arabic noun would be of the sort al-Jebrát), psychology = psychologies.