# Attribute mathematical formulae to questions with values

After performing the first step on all questions to be calculated, it is time to create the mathematical formulae. Click on “add add-ons” and, then, on “mathematical formula”.

The following editing layout will appear:

On the field “formula/expression”, insert the desired formula. On the case of the example - (S11+S12+S13).S21 – the signs supposed to be used are:

Operation | Symbol |
---|---|

addition | + |

Subtraction | - |

Division | / |

Multiplication | . |

All questions that had been through step 1 will appear on the field “variables available” and will be available to the accounts.