A calculus problem by crazy singh

Calculus Level pending

\( f\left( x \right) =\int { \frac { 2\sin { x } -\sin { 2x } }{ { x }^{ 3 } } dx } ,\quad x\neq 0 \)

then

\( \lim _{ x\to 0 } f^{ ' }\left( x \right) =? \)

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