Ese_1
[latex] \begin{aligned} A & = \frac{\pi r^2}{2} \\ \\
& = \frac{1}{2}\pi r^2 \end{aligned} [/latex]
\[\displaystyle \sqrt[3]{10}= \sum _{i}^{100}x_{i}\]
Ese_1
& = \frac{1}{2}\pi r^2 \end{aligned} [/latex]
& = \frac{1}{2}\pi r^2 \end{aligned} [/latex]