<p class="paragraph">这是两个内联公式, $\sin^2 (1^{\circ}) + \cos^2 (1^{\circ}) = 1$ 和 \(x\).</p>
<p class="paragraph">下面两个是块公式</p>
<p class="paragraph">$$
\begin{pmatrix}
1 & a_1 & a_1^2 & \cdots & a_1^n \\
1 & a_2 & a_2^2 & \cdots & a_2^n \\
\vdots & \vdots & \vdots & \ddots & \vdots \\
1 & a_m & a_m^2 & \cdots & a_m^n \\
\end{pmatrix}
$$</p>
<p class="paragraph">\[
\sin^2 (1^{\circ}) + \cdots + \sin^2 (89^{\circ}) + \sin^2 (90^{\circ})= 45.5
\]</p>