To save your formula you have written in libreoffice math press :kbd:`Control +S` or :menuselection:`File --> Save`. To open a file press :kbd:`Control +O` or :menuselection:`File --> Open`. To print your fomrula press :kbd:`Control +P` or :menuselection:`File --> Print`.
The left hand side has many symbols you can use for say set relations and other operators.
The left hand side has many symbols you can use for say set relations and other operators. To insert even more symbols :menuselection:`Tools --> Symbols`.