Use part 2 of the Fundamental Theorem of Calculus to find the derivative of
F(x)=x3sin(t4)dt\displaystyle {F}{\left({x}\right)}={\int_{{{x}}}^{{{3}}}}{\sin{{\left({t}^{{{4}}}\right)}}}{\left.{d}{t}\right.}

F(x)\displaystyle {F}'{\left({x}\right)} =  


[NOTE: Enter a function as your answer.]