What is the integral of integral of (x+y) ?

The integral of integral of (x+y) is Cy+(x^2)/2 y+(xy^2)/2+C

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integral of integral of (x+y)

\int \int (x + y) d x d y

C y + \frac{x ^{2}}{2} y + \frac{x y ^{2}}{2} + C

Solution steps

\int \int (x + y) d x d y

\int (x + y) d x = y x + \frac{x ^{2}}{2} + C

= \int (y x + \frac{x ^{2}}{2} + C) d y

\int (y x + \frac{x ^{2}}{2} + C) d y = C y + \frac{x ^{2}}{2} y + \frac{x y ^{2}}{2} + C

= C y + \frac{x ^{2}}{2} y + \frac{x y ^{2}}{2} + C

\int_{0}^{4} \int_{x}^{2} sin (y^{3}) d y d x

\int \int \int x d x d x d x

\int_{0}^{\frac{1}{16}} \int_{y^{\frac{1}{4}}}^{\frac{1}{2}} cos (16 π x^{5}) d x d y

\int \int x^{2} + y^{2} d x d y

\int \int x^{2} y d x d y

What is the integral of integral of (x+y) ?
The integral of integral of (x+y) is Cy+(x^2)/2 y+(xy^2)/2+C