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pemuonhoctoan


[tex]\int{\operatorname{{sin}^{2}x}\over\operatorname{sinx+2cosx}}dx[/tex]
[tex]\int{\operatorname{dx}\over\operatorname{2{sin}^{2}x+3{cos}^{2}x}}[/tex]
[tex]\int{\operatorname{dx}\over\operatorname{2{sin}^{2}x+3{cos}^{2}x}}[/tex]
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