In this task you're given a question and you have to paraphrase the question to create the output question while retaining the meaning of the original question.

What is the integral of [math]\sqrt {\frac {1-x^{2}}{1+x^{2}}}[/math]?
What is integral of [math]\dfrac{ln(1+x^2)}{\sqrt{1-x}}[/math] ?