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Evaluate the derivative of the integral:

$$\frac { d }{ dx } \left( \int _{ 2 }^{ x}{ t^{3}dt } \right) $$

$\cfrac{x^{4}}{4}-4$

$\cfrac{x^{4}}{4}$

$x^{3}$

$x^{3}-2^{3}$