Turunan pertama x^7.sin^3 x

[tex] \frac{d}{dx} ( x^{7} sin ^{3} x)= 7 x^{6} sin^{3} x + x^{7} 3 sin^{2} xcos x[/tex]
= [tex] x^{6} sin^{2} x ( 7sin x + 3x cos x )[/tex]