Now, I need to apply stoke's theorem to curl theorem.
My teacher gave a hint.
Accourding to the hint, I accept $w=Pdy∧dz +Q dz∧dx + R dx∧dy$ $\in Ω^2(M)$
$dim(M)=2$
M is the subset of $\Bbb R^2$
Here is my solution.
$dw=\frac{\partial P}{\partial x}dx∧dy∧dz + \frac{\partial Q}{\partial y}dy∧dz∧dx +\frac{\partial R}{\partial z}dz∧dx∧dy$
Now I need to compute $\int_{Ω^2(M)}(P_x+Q_y+R_z)dx∧dy∧dz$
$=\int_{Ω^2(M)}(P_x+Q_y+R_z)dxdydz$
Are All things I did right? And is this enough to prove?
Thank you For all kind of helps:)