Answer
$ \frac{1}{3}(x^2+4)^{1/3}(11x^2+12)$
Work Step by Step
$(x^2+4)^{4/3}+x\cdot\frac{4}{3}(x^2+4)^{1/3}\cdot2x=\frac{1}{3}(x^2+4)^{1/3}(3x^2+12+8x^2)=\frac{1}{3}(x^2+4)^{1/3}(11x^2+12)$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.