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[TEX]I=\int_{0}^{\frac{\pi}{4}}\frac{dx}{2+tanx}[/TEX]
[TEX]I=\int_{\frac{-\pi}{2}}^{\frac{\pi}{2}} \frac{xcos2x}{1+sin^2x}dx[/TEX]
[TEX]I=\int_{\frac{\pi}{6}}^{\frac{\pi}{3}} \sqrt{tg^2x+cotg^2x-2}dx[/TEX]
[TEX]I=\int_{\frac{-\pi}{2}}^{\frac{\pi}{2}} \frac{xcos2x}{1+sin^2x}dx[/TEX]
[TEX]I=\int_{\frac{\pi}{6}}^{\frac{\pi}{3}} \sqrt{tg^2x+cotg^2x-2}dx[/TEX]