1. The problem statement, all variables and given/known data Evaluate ∫F dot ds 2. Relevant equations F = < 1 - y/ (x^2 + y^2) , 1 + x/(x^2 + y^2) , e^z > C is the curve z = x^2 + y^2 -4 and x + y + z = 100 3. The attempt at a solution I don't think Stokes theorem applies since the vector field is undefined at the origin, so I'm trying a path integral according to ∫F(c(t) dot c'(t) dt for path c. The problem is that I combined the curve equations into a completed square that gave me a parameterization that I don't see how to integrate. x^2 + y^2 - 4 = 100 - x - y (x+1/2)^2 + (y+1/2) ^2 = 104.5 x = √104.5 cos t - 1/2 y = √104.5 sin t - 1/2 z = 100 - √104.5 cos t - √104.5 sin t for t from 0 to 2∏ The resulting integral is an unholy mess. Am I missing something? Thank you all for a great forum!