简单分析一下，答案如图所示
答：原式=∫[(x+2)/[2(x+1)^2]-x/[2(x^2+1)] dx=1/2*∫[(x+1+1)/(x+1)^2-x/(x^2+1) dx=1/2*∫(1/(x+1)+1/(x+1)^2-x/(x^2+1))dx=1/2*[ln|x+1|-1/(x+1)-1/2*ln(x^2+1)]+C=1/2*ln|(x+1)/√(x^2+1)|-1/2(x+1)+C
