Разложите многочлен на множители,пожалуйста: 64/343c^3+729/1000d^3

[latex]\frac{64}{343}c^3+\frac{729}{1000}d^3=\\(\frac{4}{7}c)^3+(\frac{9}{10}d)^3=\\(\frac{4}{7}c+\frac{9}{10}d)((\frac{4}{7}c)^2-\frac{4}{7}c*\frac{9}{10}d+(\frac{9}{10}d)^2)=\\(\frac{4}{7}c+\frac{9}{10}d)(\frac{16}{49}c^2-\frac{2}{7}c*\frac{9}{5}d+\frac{81}{100}d^2)=\\(\frac{4}{7}c+\frac{9}{10}d)(\frac{16}{49}c^2-\frac{18}{35}cd+\frac{81}{100}d^2)[/latex]