Hi all. I am having Calculus 1 this year. We are using a book called Thomas Calculus. I think its a lot of fun, but I have to work very much since there is basic stuff like trigonometry that I know really bad. Since I work so much with math I thought it could be fun and helpful to talk with other math people in here:-) To the question: ∫ (5x)/(3x^2+5) dx What I did was this but I think its too complicated: ∫ (1/(3x^2+5)) * 5x Integration by parts give. (5x) ln(3x^2+5) - 5 ∫ ln (3x^2+5)dx Not sure have to calculate the last integral. Not sure about anything here really..