# Working with Limits

From LibreOffice Help

### How can I define the limits in a Sum or Integral formula?

You want to insert a summation formula like "summation of s^k from k = 0 to n" at the cursor in a Writer text document.

- Choose
**Insert - Object - Formula**.

You see the Math input window and the Elements pane on the left. - From the list on the upper part of the Elements pane, select the
**Operators**item. - In the lower part of the Elements pane, click the
**Sum**icon. - To enable lower and upper limits, click additionally the
**Upper and Lower Limits**icon. - In the input window, the first placeholder or marker is selected, and you can start to enter the lower limit:

k = 0 - Press F4 to advance to the next marker, and enter the upper limit:

n - Press F4 to advance to the next marker, and enter the summand:

s^k - Now the formula is complete. Click into your text document outside the formula to leave the formula editor.

In the same way, you can enter an Integral formula with limits. When you click an icon from the Elements pane, the assigned text command is inserted in the input window. If you know the text commands, you can enter the commands directly in the input window.

- Choose
**Insert - Object - Formula**. - Click in the input window and enter the following line:

int from{a} to{b} f(x)`dx

A small gap exists between f(x) and dx, which you can also enter using the Elements pane: select the**Formats**item from the list on the top, then the**Small Gap**icon.

If you don't like the font of the letters f and x, choose Format - Fonts and select other fonts. Click the Default button to use the new fonts as default from now on. |

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