#1

Recognize that F(r,s,v) is explicitly dependent upon r,s,v and implicitly dependent upon x and y. Do find df/dx, for example, you need to find df/dr*dr/dx + df/ds*ds/dx + df/dv*dv/dx.

So, df/dx = 3r^2 * e^y + 1*ye^x + 2v * x

Did that help at all?