#### Topic: Re: R integrate (D (expression(), 1,2) - as?

Hello, Tyomchik, you wrote: Those> How to save here the intermediate result of differentiation from D (expression (...)) in a variable (that R did not try to consider D (expression (...) inside integrate) to avoid output D (expression (...))? As far as I understand, D returns expression which then it is necessary in addition evaluate. I.e. it is possible to write so: v = D (expression (x ^ 2), "x") integrate (function (x) eval (v), 1, 2)