Integrate
![(1 + {x}^{2} ) \div \sqrt{1 - {x}^{2} } (1 + {x}^{2} ) \div \sqrt{1 - {x}^{2} }](https://tex.z-dn.net/?f=%281+%2B+%7Bx%7D%5E%7B2%7D+%29+%5Cdiv++%5Csqrt%7B1+-++%7Bx%7D%5E%7B2%7D+%7D+)
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two method s are which is comfortable you
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ndhamani2002:
thnku very much
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