$$$\frac{\left(2 x + 1\right) \ln\left(x^{2} + 1\right)}{\left(x^{2} + x + 1\right)^{2} + 1}$$$ 的积分

该计算器将求出$$$\frac{\left(2 x + 1\right) \ln\left(x^{2} + 1\right)}{\left(x^{2} + x + 1\right)^{2} + 1}$$$的积分/原函数，并显示步骤。

求$$$\int \frac{\left(2 x + 1\right) \ln\left(x^{2} + 1\right)}{\left(x^{2} + x + 1\right)^{2} + 1}\, dx$$$。