What is the antiderivative of # x/(x^2+1)#? Calculus Techniques of Integration Integration by Parts 1 Answer GiĆ³ Feb 26, 2016 I found: #1/2ln(x^2+1)+c# Explanation: I tried by substitution: Answer link Related questions How do I find the integral #int(x*ln(x))dx# ? How do I find the integral #int(cos(x)/e^x)dx# ? How do I find the integral #int(x*cos(5x))dx# ? How do I find the integral #int(x*e^-x)dx# ? How do I find the integral #int(x^2*sin(pix))dx# ? How do I find the integral #intln(2x+1)dx# ? How do I find the integral #intsin^-1(x)dx# ? How do I find the integral #intarctan(4x)dx# ? How do I find the integral #intx^5*ln(x)dx# ? How do I find the integral #intx*2^xdx# ? See all questions in Integration by Parts Impact of this question 1884 views around the world You can reuse this answer Creative Commons License