Question

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

Answer 1

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