# Using the Expression builder

You can use the Expression builder to specify the equation. You can select the respective
symbols, sets, indices, constants, decision variables, and parameters by double-clicking it.
The item is added at the last saved position of cursor within the grid.

You can select single or multiple functions.

## Examples

```
SUM<j>{U[i, j, k] * datasetname.Weight[j]} <= (C[i, k] *
datasetname2.MaxWeight [i])
```

Where `< > { }`

goes together with the `SUM(Sigma)`

function and `[ ]`

is
applied for indices. Use `( )`

to prioritize/order arithematic
calculations following BODMAS.

```
PRODUCT<j>datasetName2.MaxWeight[i]+
datasetName.Weight[j]}<=C[i,k]
```

Where `< > { }`

always goes together with `PRODUCT(Pi)`

function and `[ ]`

is
applied for indices. Use `( )`

to prioritize/order arithematic
calculations following BODMAS.

`2*x1+3*x3+x4+2*x5 >=50%`

`x2-(2*x3/2)*x4+(x5^2) >=12`