| Addition(Sca, Var) | Adds a variable and a scalar; and returns the resulting linear expression. |
| Addition(Var, Sca) | Adds a variable and a scalar; and returns the resulting linear expression. |
| Addition(Var, Var) | Adds two variables; and returns the resulting linear expression. |
| Addition(Var, VarD0) | Adds two variables; and returns the resulting linear expression. |
| Addition(VarD0, Var) | Adds two variables; and returns the resulting linear expression. |