$\iint_D (x^2y+x)dxdy$
Where the area $D$ is limited by curves $y=x^2, y=2x, y=x$
Integrals looks like:
$\int_0^1 dx \int_x^{2x}(x^2y+x)dy + \int_1^2dx \int_{x^2}^{2x}(x^2y+x)dy = ...$
Also second integral:
$\iint_D (2xy+x^2+y)dxdy$
Where the area $D$ is limited by curves $y=x, y=3x, y=-x+4$
$\int_0^1 dx \int_x^{3x}(2xy+x^2+y)dy + \int_1^2dx \int_{x}^{-x+4}(2xy+x^2+y)dy = ...$
Is that correct?