Question

4 пример помогите.........срочно очень

Answer 1

$( \frac{1}{5} n) {}^{3} + 3 \times ( \frac{1}{5} n) {}^{2} \times \frac{1}{3} m + 3 \times \frac{1}{5} n( \frac{1}{3} m) {}^{2} + ( \frac{1}{3} m) {}^{3} \\ \frac{1}{125} n {}^{3} + 3 \times \frac{1}{25} n {}^{2} \times \frac{1}{3} m + 3 \times \frac{1}{5} n \times \frac{1}{9} m {}^{2} + \frac{1}{27} m {}^{3} \\ \frac{1}{125} n {}^{3} + \frac{1}{25} mn {}^{2} + \frac{1}{15} m {}^{2} n + \frac{1}{27} m {}^{?}$