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 \int x sin (y) d x d y

\int \int 0 d x d x

\int \int \frac{x}{y} d x d y

\int \int \int x yz d x d y d z

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