Question: Hello. I know that the first and last question are correct but I keep getting the one in the middle wrong. Any help would be

Hello. I know that the first and last question are correct but I keep getting the one in the middle wrong. Any help would be greatly appreciated.

Find the indicated partial derivatives of: W = V 32 + 182 + 9+2. = ar 3r/(sqrt(3r^2+s^2+9t^2)) Ow = 25/(2sqrt(3r^2+s^2+9t^2)) Os Ow 9t/(sqrt(3r^2+s^2+9t^2)) at
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