$$ \begin{aligned}\frac{5-3}{\sqrt{7}+\sqrt{2}+\sqrt{5}-1}& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}\frac{2}{\sqrt{7}+\sqrt{2}+\sqrt{5}-1}\end{aligned} $$ | |
① | Simplify numerator and denominator |