Tap the blue circles to see an explanation.
$$ \begin{aligned}(x^1x^2x^2x^4x^{10})^4& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}(x^{19})^4 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}x^{76}\end{aligned} $$ | |
① | $$ x x^2 x^2 x^4 x^{10} = x^{1 + 2 + 2 + 4 + 10} = x^{19} $$ |
② | $$ \left( x^{19} \right)^4 = 1^4 \left( x^{19} \right)^4 = x^{76} $$ |