[latex]1)int{frac{xdx}{xln^3x}[/latex]   [latex]2)int{frac{3x+5}{sin^2x}dx[/latex]   [latex]3)int{2^xsinxdx}[/latex]

[latex]1)int{frac{xdx}{xln^3x}[/latex]   [latex]2)int{frac{3x+5}{sin^2x}dx[/latex]   [latex]3)int{2^xsinxdx}[/latex]