Use Stoke's theorem to evaluate \mathbb{J}_{x} curl F-ds, where F(x,y,z)= x ^ 2 * y ^ 2 * u - sin(xyz) + xyzk. S is the part of cone y ^ 2 = x ^ 2 + x ^ 2 that the planes y 0 and y=3, oriented in the direction positive y-axis.