$3\left(4\left(x+y\right)^{2}c^{3}+5a^{3}\right)\left(ac\right)^{2}\left(x+y\right)^{7}$

$12a^{2}c^{5}x^{9}+432c^{5}\left(ay\right)^{2}x^{7}+15c^{2}a^{5}x^{7}+1512a^{2}x^{4}\left(cy\right)^{5}+1008a^{2}x^{3}c^{5}y^{6}+525c^{2}x^{3}y^{4}a^{5}+108xa^{2}c^{5}y^{8}+105xc^{2}a^{5}y^{6}+12a^{2}c^{5}y^{9}+432c^{5}\left(ax\right)^{2}y^{7}+15c^{2}a^{5}y^{7}+1512a^{2}y^{4}\left(cx\right)^{5}+1008a^{2}y^{3}c^{5}x^{6}+525c^{2}y^{3}x^{4}a^{5}+108ya^{2}c^{5}x^{8}+105yc^{2}a^{5}x^{6}+315\left(cx\right)^{2}\left(ay\right)^{5}+315\left(cy\right)^{2}\left(ax\right)^{5}$