Use the **Formula button **in the at the top of each text box in the activity editor to open the equation editor. Our equation editor uses LaTeX to format equations. For simple ones, you can just type, but there are lots of ways to make really good looking equations. Here's a pretty good cheat-sheet on how to make equations using LaTex.

When you click the formula button, another window will open where you can type in your formula as well as see a preview of what it will look like. Once you're done typing in the formula, click **Update**

Found a mistake that you made after inserting the formula? No problem! Click the formula within the textbox to open up the formula editor again. Once you've made your corrections, click **Update**.

If the syntax of your LaTex formula is wrong, you'll see red text at the bottom of the formula editor letting you know how to fix it.

Examples:

** \vec** puts a vector arrow over the next character

** \frac{a}{b} **makes a nice a/b fraction

** a^b** and

**make subscripts and super scripts**

*a_b*If you want more text in a subscript, put curly brackets around it:

*F_{net}*

** \Delta** (or any greek upper or lower) will make a nice ∆

use ** \times** instead of

*x*So here's how to write Newton's Second Law

*\vec a = \frac{ \Sigma \vec F}{m}*

You could also write it as:

*\vec a = \frac{ \vec F_{net}}{m}*

Here's a familiar kinematics equation:

*\Delta x = v_i t + \frac{1}{2} a t^2*

Here's an important chemical reaction:

C_6H_{12}O_6 +6O_2 \rightarrow 6CO_2+6H_2O +\text{ATP}