수식

인라인 수식: $f(x) = \sqrt{1+x}, \quad x \ge -1$

$f(x) = dx/dy$

$$f(𝐴) = 𝜋𝑒^2 $

$\displaystyle\sum_{i=1}^{k+1}i \displaystyle \displaystyle= \left(\sum_{i=1}^{k}i\right) +(k+1)$

$ % \f is defined as #1f(#2) using the macro
\f\relax{x} = \int_{-\infty}^\infty
\f\hat\xi\,e^{2 \pi i \xi x}
\,d\xi $

$ c = \pm\sqrt{a^2 + b^2} $