The derivative of \( f(x)=7 x^{2} \sin x \) is \( \mathrm{P} \) (1)...

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The derivative of \( f(x)=7 x^{2} \sin x \) is
\( \mathrm{P} \)
(1) \( 7 x(x \cos x+2 \sin x) \)
W
(2) \( 7 x(x \cos x-2 \sin x) \)
(3) \( 7 x(2 \sin x-x \cos x) \)
(4) \( 7 x(2 \cos x+x \sin x) \)
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