This is an input
Result \[\frac{x^2}{a^2}+\frac{y^2}{b^2}=1\]
Another example
Result will be numbered equation like this \begin{equation}\int_{-\infty}^{+\infty}e^{-x^2/2}dx=?\label{eq2}\end{equation} Just type
to call equation, labeled eq1, like (\ref{eq2}).
Now let see inline equations
This \(\frac{x^2}{a^2}+\frac{y^2}{b^2}=1\) is inline equation.
Do you like it? Get JExtBOX Equation
PSPicture Example
Another example