3.F=[y^2 x^2]
1<=x<=2 
F(r(t))=[t^-2 t^2]
dr=[1 -t^-2]dt
b)Int(t^-1-1)dt(1..2)
=-1/2
9.f(x,y)=sqrt(1+9xy)
y=x^3 (0<=x<=1) 
Int(f(x,y)(0..1)
2.8
11.f(x,y,z)=z^2
128sqrt(29)/3
=230
13.sqrt(3)/2(e-1)
=1.5
17.r(t)=[4t -3t 12t]
2<=t<=5
Int(r(t))(2..5)
39
dist between
(8 -6 24) and 
(20 -15 60)
27.Int(ydx-xdy)(0..2)
y=x^2
-8/3
29.Int((x-y)dx+(y-z)dy+zdz)
line seg (0,0,0) to 
(1,4,4)
13/2
31.pi/2
35.2-(e-1)/e

1.(0,0,0) to
(1,1,pi) 
f(x,y,z)=xysin(yz)
0
3.F(x,y)=[3 6y]
f(x,y)=3x+3y^2
r(t)=[t 2t^-1]
(1..4)
-9/4
5.32e-1
9.F=y^2+(2xy+e^z)+ye^z
f(x,y,z)=y^2x+e^zy
13.f(x,y,z)=ztanx+yz
15.F=[2xy+5 x^2-4z -4y]
f(x,y,z)=x^2y+5x
17.16
19.f=x^2y-z
r1=[t t 0](0..1)
r2=[t t^2 0](0..1)
=1