$$ \begin{aligned}\frac{criw+1}{cl(iw)^2+criw+1}& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}\frac{cirw+1}{cl1i^2w^2+criw+1} \xlongequal{ } \\[1 em] & \xlongequal{ }\frac{cirw+1}{ci^2lw^2+cirw+1}\end{aligned} $$ | |
① | $$ \left( iw \right)^2 = 1^2i^2w^2 = i^2w^2 $$ |