матем(математика, mathematics Shabe); цифры(Belka Adams); расчёт(If my math is correct and if the math of all the other actuaries to whom I have spoken is correct, the fund would more than compensate all victims. I. Havkin)
математика(AmE; (амер.англ.) the study of numbers, shapes, and space using reason and usually a special system of symbols and rules for organizing them cambridge.orgZalinaSpeaks)
cambridge.org ZalinaSpeaks)