Question

$$-3 { x }^{ 4 } +4 { x }^{ 4 } - \frac{ 2 }{ 3 } { x }^{ 4 }$$

Evaluate

$\frac{x^{4}}{3}$

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Differentiate w.r.t. x

$\frac{4x^{3}}{3}$

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