1.
Int(x^2yz)dz(0..y)=
x^2y^3/2
Int(x^2y^3/2)dy(x..3x)=
10x^6
Int(10x^6)dx(0..1)=10/7

2.
Int(yzln(x^5))dx(0..1)=
5yzlnx
Int(5yzlnx)dy(0..x)=x^2/2ln(x)5z
Int(x^2/2ln(x)5z)dz(2x..3x)=xz14x^2/2ln(x)
-5x^3zln(x)