Q: In this task, you are given two sentences in Persian separated with <sep>, and you have to determine whether the sentences are paraphrases or not. Classify your answers into "paraphrase" and "not-paraphrase".
[math]\displaystyle\int_{0}^{\infty} \dfrac{x}{x^2+a^2}\,dx [/math] <sep> [math]\displaystyle\int_{-1}^1
rac{\sqrt{1-x^2}}{a-x} \, dx[/math] where [math]a > 1[/math]
A:
not-paraphrase