1.Int(xy)dx+(y)dy(C)
=Int(0..2pi)(costheta-sintheta)
(-sin(theta))+(sin(theta)cos(theta))
d(theta)=Int(-1..1)Int(-sqrt(1-x^2)..sqrt(1-x^2))
(0-x)dydx = Int(Int(D)(dy/dx-dxy/dy)(dA))
3.Int(C)y^2dx+
x^2dy,0<=x<=1,
0<=y<=1->0
5.Int(C)x^2ydx
(0,0)->-pi/4
7.Int(C)(f.dr),
F(x,y)=[x^2,x^2],
y=x^2,y=x,0<=x<=1->1/6
9.F(x,y)=[e^x+y,e^x-y]
(0,0)(2,2)(4,2)(2,0)(0,0)
->(e^4-5)(e^2-1)/2
13.I=Int(C)(sinx+y)dx+
(3x+y)dy,(0,6)(2,4)
(2,2),(0,0)->I=34

1.F=[2xy,x,y+z]
z=1-x^2-y^2,x^2+y^2<=1
Int(Int(C)F.ds))
=Int(Int(S)curl(F).dS))=pi
3.F=[e^y-z,0,0],(1,0,1),
(1,1,1),(0,1,1),(0,0,1)
Int(Int(C)F.dS))
=Int(Int(S)curl(F).dS))=pi
5.F=[e^z^2-y,e^z^3+x,cos(xz)]
[-3z^2ez^3,2ze^z^2+zsin(xz),2]->2pi
9.F=[yz,xz,xy],x^2+y^2=1
z=1,x=4->0
11.F=[3y,-2x,3y],x^2+y^2=9,
z=2,cc->-45pi
13.F=[y,z,x],(0,0,0)(3,0,0)
(0,3,3),cc->0