示例
行内：$E=mc^2$
块级：
$$
\int_0^1 x^2\,dx=\frac{1}{3}
$$
$$
\begin{aligned}
f(x) &= a + b + c + d + e + f + g + h \\
&+ a + (b+c) + (d+e) + (f+g+h)\\
&+ a + b + c + d + e + f + g + h \\
&+ a + b + c + d + e + f + g + h \\
&+ a + b + c + d + e + f + g + h
\end{aligned}
$$
\begin{aligned}
f(x) &= a + b + c + d + e + f + g + h \\
&+ a + (b+c) + (d+e) + (f+g+h)\\
&+ a + b + c + d + e + f + g + h \\
&+ a + b + c + d + e + f + g + h \\
&+ a + b + c + d + e + f + g + h
\end{aligned}
$$
$$
f(x) = a + b + c + d + e + f + g + h + a + (b+c) + (d+e) + (f+g+h)= a + (b+c) + (d+e) + (f+g+h) + a + (b+c) + (d+e) + (f+g+h) + a + (b+c) + (d+e) + (f+g+h)
$$
f(x) = a + b + c + d + e + f + g + h + a + (b+c) + (d+e) + (f+g+h)= a + (b+c) + (d+e) + (f+g+h) + a + (b+c) + (d+e) + (f+g+h) + a + (b+c) + (d+e) + (f+g+h)
$$