$$\left. \begin{array} { l } { ( x + y ) ^ { 2 } + 2 ( x - y ) + ( x - y ) ^ { 2 } } \\ { ( x + 3 b ) ^ { 2 } - 2 ( 2 a + 3 b ) ( 3 b - a ) + ( 3 b - a ) ^ { 2 } } \end{array} \right.$$
$2\left(x^{4}+6bx^{3}+x^{3}-12abx^{2}+6bx^{2}+6bxy^{2}-6bxy-12abx+5xa^{2}-12aby^{2}-yx^{2}+12aby-5ya^{2}+5\left(ax\right)^{2}+5\left(ay\right)^{2}+\left(xy\right)^{2}\right)$
$2\left(x^{2}+x+y^{2}-y\right),\ x^{2}+6bx-12ab+5a^{2}$
