手动置顶
Contents
h1
h2
h3
$$
\begin{aligned}
&N = q\times p\\
&\phi(n)=(p-1)\times (q-1)\\
\end{aligned}
$$
$$ c = \pm\sqrt{a^2 + b^2} 123231 $$
$c = \pm\sqrt{a^2 + b^2}$
$y^2+a_1xy+a_3y=x^3+a_2x^2+a_4x+a_6$
test