$\displaystyle 1+1= 11$
$\displaystyle \boxplus \quad \boxminus \quad \boxdot $
$\displaystyle \Re \quad \Im $
$\displaystyle \curvearrowright \quad \curvearrowleft$
$\displaystyle \leftrightarrows \quad \rightleftarrows$
$\displaystyle \leftleftarrows \quad \rightrightarrows \quad \upuparrows \quad \downdownarrows$
How does one make a double countor integral in LaTeX?
It came up in a post but I had no idea.
You know,
$\displaystyle \oint$
Is a single countor integral.
A double is,
$\displaystyle \int \int$
But there is a bigger circle passing through both of these.