Terms for subject Mathematics containing calculated function

English	Russian
it is readily calculated from the function	легко вычисляется по выражению функции
many tables of values for special functions could be calculated at a time when pencil and paper were the only available орудия	единственно доступные инструменты
many tables of values for special functions could be calculated at a time when pencil and paper were the only available tools	единственно доступные инструменты