求解不定积分，不会好难🙊

确实挺麻烦
推荐一个网站
https://www.wolframalpha.com/input/?i2d=true&i=Integrate%5BPower%5BDivide%5Bx%2C%5C%2840%29Power%5Bx%2C2%5D-1%5C%2841%29%5C%2840%29x%2B1%5C%2841%29%5D%2C3%5D%2Cx%5D