Just number 5 I want to know if I am working these out right

Answer this question, only if you know the answer. 30 points and brainliest!

Find the gradient of f(x, y,z)equals=left parenthesis x squared plus y squared plus z squared right parenthesis superscript negative 1 divided by 2 baseline plus ln left parenthesis x right parenthesis x2+y2+z2−1/2+ln(xyz) at the point left parenthesis negative 2 comma 1 comma negative 2 right parenthesis(−2,1,−2).

Iwill give you ! what is the measure of ∠v ?