| Addition(Sca, Summation) | Adds a summation and a scalar; and returns the resulting linear expression. |
| Addition(Summation, Sca) | Adds a summation and a scalar; and returns the resulting linear expression. |
| Addition(Summation, Summation) | Adds two summations; and returns the resulting linear expression. |
| Addition(Summation, Term) | Adds a summation and a term; and returns the resulting linear expression. |
| Addition(Summation, Var) | Adds a summation and a variable; and returns the resulting linear expression. |
| Addition(Summation, VarD0) | Adds a summation and a scalar; and returns the resulting linear expression. |
| Addition(Term, Summation) | Adds a summation and a term; and returns the resulting linear expression. |
| Addition(Var, Summation) | Adds a summation and a variable; and returns the resulting linear expression. |
| Addition(VarD0, Summation) | Adds a summation and a scalar; and returns the resulting linear expression. |