/ _____________________\ / _____________________ \ | y \/ -(-2 + 3*y)*(2 + y) | | \/ -(-2 + 3*y)*(2 + y) y| |x + 1 + - + -----------------------|*|x + 1 - ----------------------- + -| \ 2 2 / \ 2 2/
(x + 1 + y/2 + sqrt(-(-2 + 3*y)*(2 + y))/2)*(x + 1 - sqrt(-(-2 + 3*y)*(2 + y))/2 + y/2)
2 2 x + y + 2*y + x*(2 + y)
2 2 x + y + 2*x + y*(2 + x)
2 2 x + y + 2*x + 2*y + x*y
x^2 + y^2 + 2*x + 2*y + x*y