I have the following problem;

Differentiate with respect to x;

y = (2x^5) - (3x^(1/4)) - (4/(x^7))

Now, I get that 2x^5 becomes 10x^4, and that 3x^(1/4) becomes 3/(4x^(3/4)), but what about the last part of the problem: 4/(x^7)?

Also, once I have figured that out, how do I get the final answer? Am I going in the right direction with this?

Pointing me in the direction of the techniques needed to answer the question would be appreciated more than just a direct answer.

Many thanks