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	Các bình luận về: 82. &#160; Cho \(\int\limits_0^{\frac{\pi }{4}} {\frac{{4{\rm{co}}{{\rm{s}}^3}x}}{{1 + \sin x}}\,{\rm{d}}x}&#160; = a\sqrt b&#160; &#8211; 1\) với \(a,b \in \mathbb{Z}\). Tính \(T = ab\).	</title>
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