# Adding formulas to the Solver

There are multiple ways to add formulas to the Solver:

## The Search module

At the top of every page is are links for both searching and browsing our formula database by category via the *Search module*

## Duplicating formulas

In the header bar for each formula, there is a button that duplicates that formula.

All variables and units are copied as well.

## Most-solved and recently viewed formulas

On the left-hand side of the screen, you can see a group of controls for viewing the top-solved, recently-viewed formulas, as well as equations you’ve recently added to the Solver.

*Top formulas* means the formulas you’ve solved the most if you’re a registered, logged-in user; if you’re not, these are the formulas solved the most by *all* users, ever.

Clicking on a formula will call up a popup window with detailed information about it. If appropriate, click on the button to add it to the Solver.

Note

Each of the 3 ‘top/recent’ categories only show 10 formulas at a time - use the buttons to jump to the next/previous group of 10 items.

## Worksheets

You can open a *worksheet* (a collection of formulas, comments, and plot figures) from either

- The The Finder </finder/index>
- The home page, if you are logged in

You’ll have the option to either append (or *insert*) the new worksheet into the current one, or to *open* the worksheet, causing any current worksheet to be saved and closed.