Can someone tell me the graph for this answer pls i’ll give brainlist and points

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).

Add the fractions, and simply the result to lowest terms. 2/3 + 2/7= ?

What are the exclude value of mn+3m