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半分は $\frac{1}{2}$ です.
解の公式は $x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$ です.
mimetexプラグインでTeX形式で記述した数式をWebで表示出来ます.
例えば, &mimetex("\frac{1}{2} \sin\theta"); ,
&mimetex("\int_{1}^{3} x dx"); ,
&mimetex("x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}"); などが出来ます.例えば, &mimetex("\frac{1}{2} \sin\theta"); , &mimetex("\int_{1}^{3} x dx"); , &mimetex("x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}"); などが出来ます.
#mimetex("\Large\begin{array}{rccclBCB}&f&
\longr[75]^{\alpha:{\normalsize f\rightar~g}}&
g\\ \large\gamma&\longd[50]&&\longd[50] &
\large\gamma\\ &u&\longr[75]_\beta&v\end{array}");
#mimetex("\Large\left.\begin{eqnarray} x+y+z&=&3\\
2y&=&x+z\\2x+y&=&z\end{eqnarray}\right\}");
#mimetex("\Large\overbrace{a,...,a}^{\text{k a^,s}},
\underbrace{b,...,b}_{\text{l b^,s}}\hspace{10}
\large\underbrace{\overbrace{a...a}^{\text{k a^,s}},
\overbrace{b...b}^{\text{l b^,s}}}_{\text{k+l elements}}");#mimetex("\Large\begin{array}{rccclBCB}&f&\longr[75]^{\alpha:{\normalsize f\rightar~g}}&g\\\large\gamma&\longd[50]&&\longd[50]&\large\gamma\\&u&\longr[75]_\beta&v\end{array}");
#mimetex("\Large\left.\begin{eqnarray}x+y+z&=&3\\2y&=&x+z\\2x+y&=&z\end{eqnarray}\right\}");
#mimetex("\Large\overbrace{a,...,a}^{\text{k a^,s}},\underbrace{b,...,b}_{\text{l b^,s}}\hspace{10}\large\underbrace{\overbrace{a...a}^{\text{k a^,s}}, \overbrace{b...b}^{\text{l b^,s}}}_{\text{k+l elements}}");
