What is the integral of integral of (x+y+1) ?

The integral of integral of (x+y+1) is Cy+(x^2)/2 y+xy+(xy^2)/2+C

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integral of integral of (x+y+1)

\int \int (x + y + 1) d x d y

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

Solution steps

\int \int (x + y + 1) d x d y

\int (x + y + 1) d x = x + y x + \frac{x ^{2}}{2} + C

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

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

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

\int \int 2 x y d x d y

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

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

\int \int e^{- x} d x d x

\int \int 2 x y^{3} d y d x

What is the integral of integral of (x+y+1) ?
The integral of integral of (x+y+1) is Cy+(x^2)/2 y+xy+(xy^2)/2+C