I Worked This Problem Out But I Do Not See My Answer As A Choice How Would You W 1

I worked this problem out but I do not see my answer as a choice. How would you work this problem out.
you show me step by step way so I can look at how I did the problem wrong.
Find the derivative of the following function.
y= 3x^2 +25x^-2 – 14x / 4x^8 + 14
This is Business Analysis 2372 homework.
Once you help me I will figure where I went wrong. Thanks
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