Hello, Is there a calculator out there that can solve derivative stuff like this:

Find t^(4) (n) for the function t(n) = 3n^(-1/3) + 7n^(5/3)

Yes, there are many calculators that can solve derivative problems like this. One popular calculator is Wolfram Alpha. To find the fourth derivative of t(n) = 3n^(-1/3) + 7n^(5/3), you can simply type in "d^4/dn^4 (3n^(-1/3) + 7n^(5/3))" into the search bar of Wolfram Alpha, and it will give you the answer:

t^(4)(n) = 315n^(8/3) / (n^(2/3))^5.

Just did that and it gave me

280(n^3 + 3)/(81x^(13/3) )