Помогите сократить дроби пожалуйста!,спасибо

Решите задачу:

$1)\frac{m-n}{m^{\frac{1}{2}}-n^{\frac{1}{2}}}=\frac{(m^{\frac{1}{2}})^{2}-(n^{\frac{1}{2}})^{2}}{m^{\frac{1}{2}}-n^{\frac{1}{2}}}=\frac{(m^{\frac{1}{2}}-n^{\frac{1}{2}})(m^{\frac{1}{2}}+n^{\frac{1}{2}})}{m^{\frac{1}{2}}-n^{\frac{1}{2}}}=m^{\frac{1}{2}}+n^{\frac{1}{2}}$

$2)\frac{a^{\frac{4}{5}}-b^{\frac{4}{5}}}{a^{\frac{2}{5}}-b^{\frac{2}{5}}}=\frac{(a^{\frac{2}{5}})^{2} -(b^{\frac{2}{5}})^{2}}{a^{\frac{2}{5}}-b^{\frac{2}{5}}}=\frac{(a^{\frac{2}{5}}-b^{\frac{2}{5}})(a^{\frac{2}{5}}+b^{\frac{2}{5}})}{a^{\frac{2}{5}}-b^{\frac{2}{5}}}=a^{\frac{2}{5}}+b^{\frac{2}{5} }$