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# FormulaOnMultipleLines

Categories: Math mode
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## Illustration of how you can enter a formula on two or more lines

The purpose of this example is to illustrate how you can enter a formula like this: ```	F   =   a + b + c + d + e + f + g + h + i +
j + l + m + n + o
```

I.e. a formula that's to big for one line so you have to put it on two. This example assumes that you use the `cua.bind`-layout.

### Instructions

• Start a new math-inset by pressing S-C-m.
• Type F=a+b+c+d+e+f+g+h+i+ to enter the first line. It should look like this: F = a + b + c + d + e + f + g + h + i +|
where '`|`' indicates the position of the cursor.
• Now press C-Enter. This will move the cursor to between the '`F`' and the '`=`', like this: F | = a + b + c + d + e + f + g + h + i +
Note that the cursor has moved and the space around the equal sign has increased. You have actually changed into a new math-mode where you can enter equations over several lines.
• Now press End twice to move the cursor to the rightmost position, i.e. like this:
```	F   =   a + b + c + d + e + f + g + h + i +|
```
• Now press C-Enter to add a second line (which will contain three empty blue boxes) and Down to move the cursor down.
```	F   =    a + b + c + d + e + f + g + h + i +
|
```
• Finally type j + l +m + n + o and you are done. The result should look like this: If you have an object that is within big brackets and it needs to span two lines, e.g. something like this:

```	F   = (a+b+c+d+e+
f+g+h+i+j+k)^^2^^
```

Then, you could use the math-panel to insert a special pair of brackets. On the upper line, you insert a pair of brackets where the right side is empty, and on the lower line you insert a pair of brackets where the left side is empty. The result would look like this: • Herbert pointed out that this approach can look ugly because the parenthesis are of different size...

One solution is to insert a \vphantom{} like this which amounts to making the parenthesis big enoug to cover an 'A' on both lines. See FAQ.Unsorted#phantom for some more information.

### Discussion

Feel free to discuss or comment this example here.