I just calculated the circulation and I Found it equals -2exp-2vt , But not sure! Any help?

Let see at the following vector field;

What wil be the sirculation when we move toward the clock, I.E, from (0,0) to (, 0)?

Calculate it by:

A) direct calculation of the curve integral. B) by an appropriate integral theorem.

Here: d is a line element along curve C

(x, y, t) = (cos z sin yi sin x cosyj) exp-204, *2 So dr (x, y, t) = (cos z sin yi sin x cosyj) exp-204, *2 So dr