138 Algebra. 



16. ExAMPIvKv*^. 



/. Expand (a-{-d—c)\ 

 Expand (ab-{-bc-\-ac)^. 



Expand 



r—a J 

 Expand (a-\-d-^c'-\-d)\ 

 5. Expand (" I +-''t^+x"/. 



