http://google.kr how to lievø\(x = {-b \pm \sqrt{b^2-4ac} \over 2a}\Pi \Pi \Theta \Delta \Lambda \Xi \left [ \right ]\begin{pmatrix} 1\\ 2 \end{pmatrix}\begin{bmatrix} 1 && 2 \\ 3 && 4 \end{bmatrix}\Rightarrow\Gamma \varphi \)
\(x = {-b \pm \sqrt{b^2-4ac} \over 2a}\Pi \Pi \Theta \Delta \Lambda \Xi \left [ \right ]\begin{pmatrix} 1\\ 2 \end{pmatrix}\begin{bmatrix} 1 && 2 \\ 3 && 4 \end{bmatrix}\Rightarrow\Gamma \varphi \)
