$\left(a^{2}+b^{3}\right)^{2}\left(2x+3\right)^{2}\left(a+b\right)^{3}$

$4a^{7}x^{2}+12a^{6}bx^{2}+12a^{5}b^2x^{2}+4b^3x^{2}a^{4}+8a^{5}x^{2}b^3+24a^{4}b^{4}x^{2}+24a^{3}b^{5}x^{2}+8b^{6}x^{2}a^2+4a^3x^{2}b^{6}+12a^2b^{7}x^{2}+12ab^{8}x^{2}+4b^{9}x^{2}+12a^{7}x+36a^{6}bx+36a^{5}b^2x+12b^3xa^{4}+9a^{7}+27a^{6}b+27a^{5}b^2+9b^3a^{4}+24a^{5}xb^3+72a^{4}b^{4}x+72a^{3}b^{5}x+24b^{6}xa^2+18a^{5}b^3+54a^{4}b^{4}+54a^{3}b^{5}+18b^{6}a^2+12a^3xb^{6}+36a^2b^{7}x+36ab^{8}x+12b^{9}x+9a^3b^{6}+27a^2b^{7}+27ab^{8}+9b^{9}$