Question

请数学高手看看这个怎么做啊指点点

Answer 1

2x*arctanx +1

√3/3

2*e^tan2x/1+4x^2

2dx/√1-4x^2

2x/(1+2x^2) + 1/2√x

1

2/(1+x) - 2x(2+x)/(1+x)^3